diff --git a/Polyhedron/demo/Polyhedron/Selection_widget.ui b/Polyhedron/demo/Polyhedron/Selection_widget.ui
index cbdc0f6be44..499a78cea2a 100644
--- a/Polyhedron/demo/Polyhedron/Selection_widget.ui
+++ b/Polyhedron/demo/Polyhedron/Selection_widget.ui
@@ -6,15 +6,15 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>399</width>
-    <height>556</height>
+    <width>455</width>
+    <height>684</height>
    </rect>
   </property>
   <property name="windowTitle">
    <string>Selection</string>
   </property>
   <widget class="QWidget" name="dockWidgetContents">
-   <layout class="QVBoxLayout" name="verticalLayout_5">
+   <layout class="QVBoxLayout" name="verticalLayout">
     <item>
      <layout class="QVBoxLayout" name="verticalLayout_3">
       <item>
@@ -71,81 +71,72 @@
      </spacer>
     </item>
     <item>
-     <widget class="QGroupBox" name="groupBox_2">
-      <property name="title">
-       <string/>
-      </property>
-      <layout class="QVBoxLayout" name="verticalLayout_6">
-       <item>
-        <layout class="QVBoxLayout" name="verticalLayout_2">
-         <item>
-          <layout class="QHBoxLayout" name="horizontalLayout_2">
-           <item>
-            <layout class="QHBoxLayout" name="horizontalLayout">
-             <item>
-              <widget class="QRadioButton" name="Insertion_radio_button">
-               <property name="text">
-                <string>Insertion</string>
-               </property>
-               <property name="checked">
-                <bool>true</bool>
-               </property>
-              </widget>
-             </item>
-             <item>
-              <widget class="QRadioButton" name="Removal_radio_button">
-               <property name="text">
-                <string>Removal</string>
-               </property>
-              </widget>
-             </item>
-            </layout>
-           </item>
-           <item>
-            <layout class="QVBoxLayout" name="verticalLayout_7">
-             <item>
-              <layout class="QHBoxLayout" name="horizontalLayout_6">
-               <item>
-                <widget class="QLabel" name="label">
-                 <property name="text">
-                  <string>Brush &amp;size:</string>
-                 </property>
-                 <property name="buddy">
-                  <cstring>Brush_size_spin_box</cstring>
-                 </property>
-                </widget>
-               </item>
-               <item>
-                <widget class="QSpinBox" name="Brush_size_spin_box"/>
-               </item>
-              </layout>
-             </item>
-            </layout>
-           </item>
-          </layout>
-         </item>
-         <item>
-          <layout class="QHBoxLayout" name="horizontalLayout_3">
-           <item>
-            <widget class="QPushButton" name="Select_all_button">
-             <property name="text">
-              <string>Select &amp;All</string>
-             </property>
-            </widget>
-           </item>
-           <item>
-            <widget class="QPushButton" name="Clear_button">
-             <property name="text">
-              <string>&amp;Clear</string>
-             </property>
-            </widget>
-           </item>
-          </layout>
-         </item>
-        </layout>
-       </item>
-      </layout>
-     </widget>
+     <layout class="QVBoxLayout" name="verticalLayout_2">
+      <item>
+       <layout class="QHBoxLayout" name="horizontalLayout_2">
+        <item>
+         <layout class="QHBoxLayout" name="horizontalLayout">
+          <item>
+           <widget class="QRadioButton" name="Insertion_radio_button">
+            <property name="text">
+             <string>Insertion</string>
+            </property>
+            <property name="checked">
+             <bool>true</bool>
+            </property>
+           </widget>
+          </item>
+          <item>
+           <widget class="QRadioButton" name="Removal_radio_button">
+            <property name="text">
+             <string>Removal</string>
+            </property>
+           </widget>
+          </item>
+         </layout>
+        </item>
+        <item>
+         <layout class="QVBoxLayout" name="verticalLayout_7">
+          <item>
+           <layout class="QHBoxLayout" name="horizontalLayout_6">
+            <item>
+             <widget class="QLabel" name="label">
+              <property name="text">
+               <string>Brush &amp;size:</string>
+              </property>
+              <property name="buddy">
+               <cstring>Brush_size_spin_box</cstring>
+              </property>
+             </widget>
+            </item>
+            <item>
+             <widget class="QSpinBox" name="Brush_size_spin_box"/>
+            </item>
+           </layout>
+          </item>
+         </layout>
+        </item>
+       </layout>
+      </item>
+      <item>
+       <layout class="QHBoxLayout" name="horizontalLayout_3">
+        <item>
+         <widget class="QPushButton" name="Select_all_button">
+          <property name="text">
+           <string>Select &amp;All</string>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <widget class="QPushButton" name="Clear_button">
+          <property name="text">
+           <string>&amp;Clear</string>
+          </property>
+         </widget>
+        </item>
+       </layout>
+      </item>
+     </layout>
     </item>
     <item>
      <spacer name="verticalSpacer_2">
@@ -161,55 +152,46 @@
      </spacer>
     </item>
     <item>
-     <widget class="QGroupBox" name="groupBox">
-      <property name="title">
-       <string/>
-      </property>
-      <layout class="QVBoxLayout" name="verticalLayout_8">
-       <item>
-        <layout class="QVBoxLayout" name="verticalLayout_4">
-         <item>
-          <layout class="QHBoxLayout" name="horizontalLayout_5">
-           <item>
-            <widget class="QLabel" name="label_3">
-             <property name="text">
-              <string>Isolated &amp;Component Size:</string>
-             </property>
-             <property name="buddy">
-              <cstring>Threshold_size_spin_box</cstring>
-             </property>
-            </widget>
-           </item>
-           <item>
-            <widget class="QSpinBox" name="Threshold_size_spin_box">
-             <property name="maximum">
-              <number>999999999</number>
-             </property>
-             <property name="value">
-              <number>8</number>
-             </property>
-            </widget>
-           </item>
-           <item>
-            <widget class="QPushButton" name="Get_minimum_button">
-             <property name="text">
-              <string>&amp;Get Minimum</string>
-             </property>
-            </widget>
-           </item>
-          </layout>
-         </item>
-         <item>
-          <widget class="QPushButton" name="Select_isolated_components_button">
-           <property name="text">
-            <string>Select &amp;Isolated Components Below Threshold</string>
-           </property>
-          </widget>
-         </item>
-        </layout>
-       </item>
-      </layout>
-     </widget>
+     <layout class="QVBoxLayout" name="verticalLayout_4">
+      <item>
+       <layout class="QHBoxLayout" name="horizontalLayout_5">
+        <item>
+         <widget class="QLabel" name="label_3">
+          <property name="text">
+           <string>Isolated &amp;Component Size:</string>
+          </property>
+          <property name="buddy">
+           <cstring>Threshold_size_spin_box</cstring>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <widget class="QSpinBox" name="Threshold_size_spin_box">
+          <property name="maximum">
+           <number>999999999</number>
+          </property>
+          <property name="value">
+           <number>8</number>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <widget class="QPushButton" name="Get_minimum_button">
+          <property name="text">
+           <string>&amp;Get Minimum</string>
+          </property>
+         </widget>
+        </item>
+       </layout>
+      </item>
+      <item>
+       <widget class="QPushButton" name="Select_isolated_components_button">
+        <property name="text">
+         <string>Select &amp;Isolated Components Below Threshold</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
     </item>
     <item>
      <spacer name="verticalSpacer_3">
@@ -225,52 +207,41 @@
      </spacer>
     </item>
     <item>
-     <widget class="QGroupBox" name="groupBox_3">
-      <property name="minimumSize">
-       <size>
-        <width>316</width>
-        <height>50</height>
-       </size>
-      </property>
-      <property name="title">
-       <string/>
-      </property>
-      <layout class="QHBoxLayout" name="horizontalLayout_7">
-       <item>
-        <widget class="QLabel" name="label_6">
-         <property name="text">
-          <string>Sharp edges angle:</string>
-         </property>
-         <property name="alignment">
-          <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
-         </property>
-        </widget>
-       </item>
-       <item>
-        <widget class="QSpinBox" name="Sharp_angle_spinbox">
-         <property name="sizePolicy">
-          <sizepolicy hsizetype="Minimum" vsizetype="Fixed">
-           <horstretch>0</horstretch>
-           <verstretch>0</verstretch>
-          </sizepolicy>
-         </property>
-         <property name="maximum">
-          <number>180</number>
-         </property>
-         <property name="value">
-          <number>60</number>
-         </property>
-        </widget>
-       </item>
-       <item>
-        <widget class="QPushButton" name="Select_sharp_edges_button">
-         <property name="text">
-          <string>Select</string>
-         </property>
-        </widget>
-       </item>
-      </layout>
-     </widget>
+     <layout class="QHBoxLayout" name="horizontalLayout_7">
+      <item>
+       <widget class="QLabel" name="label_6">
+        <property name="text">
+         <string>Sharp edges angle:</string>
+        </property>
+        <property name="alignment">
+         <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QSpinBox" name="Sharp_angle_spinbox">
+        <property name="sizePolicy">
+         <sizepolicy hsizetype="Minimum" vsizetype="Fixed">
+          <horstretch>0</horstretch>
+          <verstretch>0</verstretch>
+         </sizepolicy>
+        </property>
+        <property name="maximum">
+         <number>180</number>
+        </property>
+        <property name="value">
+         <number>60</number>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QPushButton" name="Select_sharp_edges_button">
+        <property name="text">
+         <string>Select</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
     </item>
     <item>
      <spacer name="verticalSpacer_1">
@@ -286,43 +257,32 @@
      </spacer>
     </item>
     <item>
-     <widget class="QGroupBox" name="groupBox_4">
-      <property name="minimumSize">
-       <size>
-        <width>316</width>
-        <height>50</height>
-       </size>
-      </property>
-      <property name="title">
-       <string/>
-      </property>
-      <layout class="QHBoxLayout" name="horizontalLayout_8">
-       <item>
-        <widget class="QLabel" name="label_5">
-         <property name="text">
-          <string>Dilate or erode selection:</string>
-         </property>
-        </widget>
-       </item>
-       <item>
-        <widget class="QSpinBox" name="Dilate_erode_spin_box">
-         <property name="minimum">
-          <number>-50</number>
-         </property>
-         <property name="maximum">
-          <number>50</number>
-         </property>
-        </widget>
-       </item>
-       <item>
-        <widget class="QPushButton" name="Dilate_erode_button">
-         <property name="text">
-          <string>Apply</string>
-         </property>
-        </widget>
-       </item>
-      </layout>
-     </widget>
+     <layout class="QHBoxLayout" name="horizontalLayout_8">
+      <item>
+       <widget class="QLabel" name="label_5">
+        <property name="text">
+         <string>Dilate or erode selection:</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QSpinBox" name="Dilate_erode_spin_box">
+        <property name="minimum">
+         <number>-50</number>
+        </property>
+        <property name="maximum">
+         <number>50</number>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QPushButton" name="Dilate_erode_button">
+        <property name="text">
+         <string>Apply</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
     </item>
     <item>
      <spacer name="verticalSpacer_5">