diff --git a/invesalius/.idea/workspace.xml b/invesalius/.idea/workspace.xml
index 8ee56dd..dad1996 100644
--- a/invesalius/.idea/workspace.xml
+++ b/invesalius/.idea/workspace.xml
@@ -14,13 +14,10 @@
     <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />
     <option name="LAST_RESOLUTION" value="IGNORE" />
   </component>
-  <component name="ChangesViewManager" flattened_view="true" show_ignored="false" />
+  <component name="ChangesViewManager" flattened_view="true" show_ignored="true" />
   <component name="CreatePatchCommitExecutor">
     <option name="PATCH_PATH" value="" />
   </component>
-  <component name="DaemonCodeAnalyzer">
-    <disable_hints />
-  </component>
   <component name="ExecutionTargetManager" SELECTED_TARGET="default_target" />
   <component name="FavoritesManager">
     <favorites_list name="invesalius" />
@@ -32,7 +29,7 @@
           <file leaf-file-name="coordinates.py" pinned="false" current-in-tab="false">
             <entry file="file://$PROJECT_DIR$/data/coordinates.py">
               <provider selected="true" editor-type-id="text-editor">
-                <state vertical-scroll-proportion="0.0" vertical-offset="102" max-vertical-offset="4964">
+                <state vertical-scroll-proportion="0.0">
                   <caret line="24" column="0" selection-start-line="24" selection-start-column="0" selection-end-line="24" selection-end-column="0" />
                   <folding>
                     <element signature="e#2#20#0" expanded="true" />
@@ -45,7 +42,7 @@
           <file leaf-file-name="trackers.py" pinned="false" current-in-tab="false">
             <entry file="file://$PROJECT_DIR$/data/trackers.py">
               <provider selected="true" editor-type-id="text-editor">
-                <state vertical-scroll-proportion="0.0" vertical-offset="204" max-vertical-offset="3383">
+                <state vertical-scroll-proportion="0.0">
                   <caret line="21" column="0" selection-start-line="21" selection-start-column="0" selection-end-line="21" selection-end-column="0" />
                   <folding>
                     <element signature="e#0#20#0" expanded="true" />
@@ -57,7 +54,7 @@
           <file leaf-file-name="dialogs.py" pinned="false" current-in-tab="false">
             <entry file="file://$PROJECT_DIR$/gui/dialogs.py">
               <provider selected="true" editor-type-id="text-editor">
-                <state vertical-scroll-proportion="0.0" vertical-offset="10846" max-vertical-offset="45050">
+                <state vertical-scroll-proportion="0.0">
                   <caret line="663" column="54" selection-start-line="663" selection-start-column="54" selection-end-line="663" selection-end-column="54" />
                   <folding>
                     <element signature="e#1053#1062#0" expanded="true" />
@@ -69,7 +66,7 @@
           <file leaf-file-name="task_navigator.py" pinned="false" current-in-tab="false">
             <entry file="file://$PROJECT_DIR$/gui/task_navigator.py">
               <provider selected="true" editor-type-id="text-editor">
-                <state vertical-scroll-proportion="0.0" vertical-offset="1575" max-vertical-offset="14892">
+                <state vertical-scroll-proportion="0.0">
                   <caret line="107" column="9" selection-start-line="107" selection-start-column="8" selection-end-line="107" selection-end-column="9" />
                   <folding>
                     <element signature="e#1007#1017#0" expanded="true" />
@@ -81,7 +78,7 @@
           <file leaf-file-name="bases.py" pinned="false" current-in-tab="true">
             <entry file="file://$PROJECT_DIR$/data/bases.py">
               <provider selected="true" editor-type-id="text-editor">
-                <state vertical-scroll-proportion="0.5210608" vertical-offset="652" max-vertical-offset="1564">
+                <state vertical-scroll-proportion="0.5223368">
                   <caret line="59" column="63" selection-start-line="59" selection-start-column="63" selection-end-line="59" selection-end-column="63" />
                   <folding />
                 </state>
@@ -91,7 +88,7 @@
           <file leaf-file-name="constants.py" pinned="false" current-in-tab="false">
             <entry file="file://$PROJECT_DIR$/constants.py">
               <provider selected="true" editor-type-id="text-editor">
-                <state vertical-scroll-proportion="0.0" vertical-offset="9520" max-vertical-offset="10115">
+                <state vertical-scroll-proportion="0.0">
                   <caret line="592" column="5" selection-start-line="592" selection-start-column="5" selection-end-line="592" selection-end-column="5" />
                   <folding />
                 </state>
@@ -101,7 +98,7 @@
           <file leaf-file-name="viewer_volume.py" pinned="false" current-in-tab="false">
             <entry file="file://$PROJECT_DIR$/data/viewer_volume.py">
               <provider selected="true" editor-type-id="text-editor">
-                <state vertical-scroll-proportion="0.0" vertical-offset="15243" max-vertical-offset="23001">
+                <state vertical-scroll-proportion="0.0">
                   <caret line="24" column="10" selection-start-line="24" selection-start-column="10" selection-end-line="24" selection-end-column="10" />
                   <folding />
                 </state>
@@ -111,7 +108,7 @@
           <file leaf-file-name="measures.py" pinned="false" current-in-tab="false">
             <entry file="file://$PROJECT_DIR$/data/measures.py">
               <provider selected="true" editor-type-id="text-editor">
-                <state vertical-scroll-proportion="0.0" vertical-offset="0" max-vertical-offset="12206">
+                <state vertical-scroll-proportion="0.0">
                   <caret line="0" column="0" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
                   <folding />
                 </state>
@@ -125,7 +122,7 @@
           <file leaf-file-name="task_surface.py" pinned="false" current-in-tab="false">
             <entry file="file://$PROJECT_DIR$/gui/task_surface.py">
               <provider selected="true" editor-type-id="text-editor">
-                <state vertical-scroll-proportion="0.0" vertical-offset="1836" max-vertical-offset="9877">
+                <state vertical-scroll-proportion="0.0">
                   <caret line="189" column="0" selection-start-line="189" selection-start-column="0" selection-end-line="189" selection-end-column="0" />
                   <folding />
                 </state>
@@ -135,7 +132,7 @@
           <file leaf-file-name="viewer_slice.py" pinned="false" current-in-tab="true">
             <entry file="file://$PROJECT_DIR$/data/viewer_slice.py">
               <provider selected="true" editor-type-id="text-editor">
-                <state vertical-scroll-proportion="0.57722306" vertical-offset="12227" max-vertical-offset="22423">
+                <state vertical-scroll-proportion="0.0">
                   <caret line="741" column="57" selection-start-line="741" selection-start-column="57" selection-end-line="741" selection-end-column="57" />
                   <folding>
                     <element signature="e#1054#1070#0" expanded="true" />
@@ -164,9 +161,13 @@
       </list>
     </option>
   </component>
+  <component name="JsBuildToolGruntFileManager" detection-done="true" />
   <component name="JsGulpfileManager">
     <detection-done>true</detection-done>
   </component>
+  <component name="NamedScopeManager">
+    <order />
+  </component>
   <component name="ProjectFrameBounds">
     <option name="width" value="960" />
     <option name="height" value="1040" />
@@ -194,7 +195,6 @@
       <sortByType />
     </navigator>
     <panes>
-      <pane id="Scope" />
       <pane id="ProjectPane">
         <subPane>
           <PATH>
@@ -243,6 +243,8 @@
           </PATH>
         </subPane>
       </pane>
+      <pane id="Scratches" />
+      <pane id="Scope" />
     </panes>
   </component>
   <component name="PropertiesComponent">
@@ -259,7 +261,7 @@
     </option>
   </component>
   <component name="RunManager">
-    <configuration default="true" type="PythonConfigurationType" factoryName="Python">
+    <configuration default="true" type="DjangoTestsConfigurationType" factoryName="Django tests">
       <option name="INTERPRETER_OPTIONS" value="" />
       <option name="PARENT_ENVS" value="true" />
       <envs>
@@ -272,9 +274,14 @@
       <option name="ADD_SOURCE_ROOTS" value="true" />
       <module name="invesalius" />
       <EXTENSION ID="PythonCoverageRunConfigurationExtension" enabled="false" sample_coverage="true" runner="coverage.py" />
-      <option name="SCRIPT_NAME" value="" />
-      <option name="PARAMETERS" value="" />
-      <option name="SHOW_COMMAND_LINE" value="false" />
+      <option name="TARGET" value="" />
+      <option name="SETTINGS_FILE" value="" />
+      <option name="CUSTOM_SETTINGS" value="false" />
+      <option name="USE_OPTIONS" value="false" />
+      <option name="OPTIONS" value="" />
+      <method />
+    </configuration>
+    <configuration default="true" type="JavascriptDebugType" factoryName="JavaScript Debug">
       <method />
     </configuration>
     <configuration default="true" type="PyBehaveRunConfigurationType" factoryName="Behave">
@@ -291,7 +298,7 @@
       <option name="ADDITIONAL_ARGS" value="" />
       <method />
     </configuration>
-    <configuration default="true" type="tests" factoryName="Unittests">
+    <configuration default="true" type="PyLettuceRunConfigurationType" factoryName="Lettuce">
       <option name="INTERPRETER_OPTIONS" value="" />
       <option name="PARENT_ENVS" value="true" />
       <envs />
@@ -302,22 +309,15 @@
       <option name="ADD_SOURCE_ROOTS" value="true" />
       <module name="invesalius" />
       <EXTENSION ID="PythonCoverageRunConfigurationExtension" enabled="false" sample_coverage="true" runner="coverage.py" />
-      <option name="SCRIPT_NAME" value="" />
-      <option name="CLASS_NAME" value="" />
-      <option name="METHOD_NAME" value="" />
-      <option name="FOLDER_NAME" value="" />
-      <option name="TEST_TYPE" value="TEST_SCRIPT" />
-      <option name="PATTERN" value="" />
-      <option name="USE_PATTERN" value="false" />
-      <option name="PUREUNITTEST" value="true" />
-      <option name="PARAMS" value="" />
-      <option name="USE_PARAM" value="false" />
+      <option name="ADDITIONAL_ARGS" value="" />
       <method />
     </configuration>
-    <configuration default="true" type="tests" factoryName="py.test">
+    <configuration default="true" type="PythonConfigurationType" factoryName="Python">
       <option name="INTERPRETER_OPTIONS" value="" />
       <option name="PARENT_ENVS" value="true" />
-      <envs />
+      <envs>
+        <env name="PYTHONUNBUFFERED" value="1" />
+      </envs>
       <option name="SDK_HOME" value="" />
       <option name="WORKING_DIRECTORY" value="" />
       <option name="IS_MODULE_SDK" value="false" />
@@ -326,20 +326,20 @@
       <module name="invesalius" />
       <EXTENSION ID="PythonCoverageRunConfigurationExtension" enabled="false" sample_coverage="true" runner="coverage.py" />
       <option name="SCRIPT_NAME" value="" />
-      <option name="CLASS_NAME" value="" />
-      <option name="METHOD_NAME" value="" />
-      <option name="FOLDER_NAME" value="" />
-      <option name="TEST_TYPE" value="TEST_SCRIPT" />
-      <option name="PATTERN" value="" />
-      <option name="USE_PATTERN" value="false" />
-      <option name="testToRun" value="" />
-      <option name="keywords" value="" />
-      <option name="params" value="" />
-      <option name="USE_PARAM" value="false" />
-      <option name="USE_KEYWORD" value="false" />
+      <option name="PARAMETERS" value="" />
+      <option name="SHOW_COMMAND_LINE" value="false" />
       <method />
     </configuration>
-    <configuration default="true" type="PyLettuceRunConfigurationType" factoryName="Lettuce">
+    <configuration default="true" type="js.build_tools.gulp" factoryName="Gulp.js">
+      <node-options />
+      <gulpfile />
+      <tasks />
+      <arguments />
+      <pass-parent-envs>true</pass-parent-envs>
+      <envs />
+      <method />
+    </configuration>
+    <configuration default="true" type="tests" factoryName="Attests">
       <option name="INTERPRETER_OPTIONS" value="" />
       <option name="PARENT_ENVS" value="true" />
       <envs />
@@ -350,13 +350,16 @@
       <option name="ADD_SOURCE_ROOTS" value="true" />
       <module name="invesalius" />
       <EXTENSION ID="PythonCoverageRunConfigurationExtension" enabled="false" sample_coverage="true" runner="coverage.py" />
-      <option name="ADDITIONAL_ARGS" value="" />
-      <method />
-    </configuration>
-    <configuration default="true" type="JavascriptDebugType" factoryName="JavaScript Debug">
+      <option name="SCRIPT_NAME" value="" />
+      <option name="CLASS_NAME" value="" />
+      <option name="METHOD_NAME" value="" />
+      <option name="FOLDER_NAME" value="" />
+      <option name="TEST_TYPE" value="TEST_SCRIPT" />
+      <option name="PATTERN" value="" />
+      <option name="USE_PATTERN" value="false" />
       <method />
     </configuration>
-    <configuration default="true" type="tests" factoryName="Attests">
+    <configuration default="true" type="tests" factoryName="Doctests">
       <option name="INTERPRETER_OPTIONS" value="" />
       <option name="PARENT_ENVS" value="true" />
       <envs />
@@ -376,7 +379,7 @@
       <option name="USE_PATTERN" value="false" />
       <method />
     </configuration>
-    <configuration default="true" type="tests" factoryName="Doctests">
+    <configuration default="true" type="tests" factoryName="Nosetests">
       <option name="INTERPRETER_OPTIONS" value="" />
       <option name="PARENT_ENVS" value="true" />
       <envs />
@@ -394,14 +397,14 @@
       <option name="TEST_TYPE" value="TEST_SCRIPT" />
       <option name="PATTERN" value="" />
       <option name="USE_PATTERN" value="false" />
+      <option name="PARAMS" value="" />
+      <option name="USE_PARAM" value="false" />
       <method />
     </configuration>
-    <configuration default="true" type="DjangoTestsConfigurationType" factoryName="Django tests">
+    <configuration default="true" type="tests" factoryName="Unittests">
       <option name="INTERPRETER_OPTIONS" value="" />
       <option name="PARENT_ENVS" value="true" />
-      <envs>
-        <env name="PYTHONUNBUFFERED" value="1" />
-      </envs>
+      <envs />
       <option name="SDK_HOME" value="" />
       <option name="WORKING_DIRECTORY" value="" />
       <option name="IS_MODULE_SDK" value="false" />
@@ -409,14 +412,19 @@
       <option name="ADD_SOURCE_ROOTS" value="true" />
       <module name="invesalius" />
       <EXTENSION ID="PythonCoverageRunConfigurationExtension" enabled="false" sample_coverage="true" runner="coverage.py" />
-      <option name="TARGET" value="" />
-      <option name="SETTINGS_FILE" value="" />
-      <option name="CUSTOM_SETTINGS" value="false" />
-      <option name="USE_OPTIONS" value="false" />
-      <option name="OPTIONS" value="" />
+      <option name="SCRIPT_NAME" value="" />
+      <option name="CLASS_NAME" value="" />
+      <option name="METHOD_NAME" value="" />
+      <option name="FOLDER_NAME" value="" />
+      <option name="TEST_TYPE" value="TEST_SCRIPT" />
+      <option name="PATTERN" value="" />
+      <option name="USE_PATTERN" value="false" />
+      <option name="PUREUNITTEST" value="true" />
+      <option name="PARAMS" value="" />
+      <option name="USE_PARAM" value="false" />
       <method />
     </configuration>
-    <configuration default="true" type="tests" factoryName="Nosetests">
+    <configuration default="true" type="tests" factoryName="py.test">
       <option name="INTERPRETER_OPTIONS" value="" />
       <option name="PARENT_ENVS" value="true" />
       <envs />
@@ -434,20 +442,13 @@
       <option name="TEST_TYPE" value="TEST_SCRIPT" />
       <option name="PATTERN" value="" />
       <option name="USE_PATTERN" value="false" />
-      <option name="PARAMS" value="" />
+      <option name="testToRun" value="" />
+      <option name="keywords" value="" />
+      <option name="params" value="" />
       <option name="USE_PARAM" value="false" />
+      <option name="USE_KEYWORD" value="false" />
       <method />
     </configuration>
-    <configuration default="true" type="js.build_tools.gulp" factoryName="Gulp.js">
-      <node-options />
-      <gulpfile />
-      <tasks />
-      <arguments />
-      <pass-parent-envs>true</pass-parent-envs>
-      <envs />
-      <method />
-    </configuration>
-    <list size="0" />
   </component>
   <component name="ShelveChangesManager" show_recycled="false" />
   <component name="SvnConfiguration">
@@ -484,19 +485,19 @@
   </component>
   <component name="ToolWindowManager">
     <frame x="0" y="0" width="960" height="1040" extended-state="0" />
-    <editor active="true" />
+    <editor active="false" />
     <layout>
-      <window_info id="Changes" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" weight="0.33513513" sideWeight="0.5" order="7" side_tool="false" content_ui="tabs" />
-      <window_info id="Project" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" weight="0.3422222" sideWeight="0.49932158" order="0" side_tool="false" content_ui="combo" />
+      <window_info id="Project" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" weight="0.35" sideWeight="0.49932158" order="0" side_tool="false" content_ui="combo" />
       <window_info id="TODO" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" weight="0.20324324" sideWeight="0.5" order="6" side_tool="false" content_ui="tabs" />
       <window_info id="Event Log" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" weight="0.33" sideWeight="0.5" order="7" side_tool="true" content_ui="tabs" />
       <window_info id="Application Servers" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" weight="0.33" sideWeight="0.5" order="7" side_tool="false" content_ui="tabs" />
       <window_info id="Database" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" weight="0.33" sideWeight="0.5" order="3" side_tool="false" content_ui="tabs" />
       <window_info id="Python Console" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" weight="0.28756756" sideWeight="0.5" order="7" side_tool="false" content_ui="tabs" />
-      <window_info id="Version Control" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" weight="0.33" sideWeight="0.5" order="7" side_tool="false" content_ui="tabs" />
+      <window_info id="Version Control" active="true" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" weight="0.32967034" sideWeight="0.5" order="7" side_tool="false" content_ui="tabs" />
       <window_info id="Structure" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" weight="0.25" sideWeight="0.5" order="1" side_tool="false" content_ui="tabs" />
-      <window_info id="Terminal" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" weight="0.24972497" sideWeight="0.5" order="7" side_tool="false" content_ui="tabs" />
+      <window_info id="Terminal" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" weight="0.24945055" sideWeight="0.5" order="7" side_tool="false" content_ui="tabs" />
       <window_info id="Favorites" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" weight="0.14818764" sideWeight="0.5006784" order="2" side_tool="true" content_ui="tabs" />
+      <window_info id="Changes" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" weight="0.33513513" sideWeight="0.5" order="7" side_tool="false" content_ui="tabs" />
       <window_info id="Cvs" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" weight="0.25" sideWeight="0.5" order="4" side_tool="false" content_ui="tabs" />
       <window_info id="Message" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" weight="0.33" sideWeight="0.5" order="0" side_tool="false" content_ui="tabs" />
       <window_info id="Commander" active="false" anchor="right" auto_hide="false" internal_type="SLIDING" type="SLIDING" visible="false" weight="0.4" sideWeight="0.5" order="0" side_tool="false" content_ui="tabs" />
@@ -519,11 +520,6 @@
   <component name="VcsContentAnnotationSettings">
     <option name="myLimit" value="2678400000" />
   </component>
-  <component name="VcsManagerConfiguration">
-    <option name="myTodoPanelSettings">
-      <TodoPanelSettings />
-    </option>
-  </component>
   <component name="XDebuggerManager">
     <breakpoint-manager>
       <breakpoints>
@@ -560,14 +556,14 @@
   <component name="editorHistoryManager">
     <entry file="file://$PROJECT_DIR$/presets.py">
       <provider selected="true" editor-type-id="text-editor">
-        <state vertical-scroll-proportion="0.0" vertical-offset="258" max-vertical-offset="3213">
+        <state vertical-scroll-proportion="0.0">
           <caret line="0" column="0" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
         </state>
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/data/coordinates.py">
       <provider selected="true" editor-type-id="text-editor">
-        <state vertical-scroll-proportion="0.0" vertical-offset="0" max-vertical-offset="5423">
+        <state vertical-scroll-proportion="0.0">
           <caret line="0" column="0" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
           <folding>
             <element signature="e#2#20#0" expanded="true" />
@@ -578,7 +574,7 @@
     </entry>
     <entry file="file://$PROJECT_DIR$/gui/task_navigator.py">
       <provider selected="true" editor-type-id="text-editor">
-        <state vertical-scroll-proportion="0.0" vertical-offset="7890" max-vertical-offset="14637">
+        <state vertical-scroll-proportion="0.0">
           <caret line="494" column="28" selection-start-line="494" selection-start-column="28" selection-end-line="494" selection-end-column="28" />
           <folding>
             <element signature="e#1007#1017#0" expanded="true" />
@@ -588,7 +584,7 @@
     </entry>
     <entry file="file://$PROJECT_DIR$/constants.py">
       <provider selected="true" editor-type-id="text-editor">
-        <state vertical-scroll-proportion="0.0" vertical-offset="9462" max-vertical-offset="10064">
+        <state vertical-scroll-proportion="0.0">
           <caret line="576" column="10" selection-start-line="576" selection-start-column="10" selection-end-line="576" selection-end-column="10" />
           <folding />
         </state>
@@ -596,28 +592,28 @@
     </entry>
     <entry file="file://$PROJECT_DIR$/data/slice_.py">
       <provider selected="true" editor-type-id="text-editor">
-        <state vertical-scroll-proportion="0.0" vertical-offset="1326" max-vertical-offset="22457">
+        <state vertical-scroll-proportion="0.0">
           <caret line="37" column="7" selection-start-line="37" selection-start-column="7" selection-end-line="37" selection-end-column="7" />
         </state>
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/gui/task_slice.py">
       <provider selected="true" editor-type-id="text-editor">
-        <state vertical-scroll-proportion="0.0" vertical-offset="9656" max-vertical-offset="14365">
+        <state vertical-scroll-proportion="0.0">
           <caret line="608" column="59" selection-start-line="608" selection-start-column="59" selection-end-line="608" selection-end-column="59" />
         </state>
       </provider>
     </entry>
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       <provider selected="true" editor-type-id="text-editor">
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libgit2 0.21.2