Revert "Remove icon"

This reverts commit 15f8dc3.

Author: IvenBach

Rubberduck.Resources/RubberduckUI.Designer.cs

@@ -1199,6 +1199,9 @@ NOTE: Restart is required for the setting to take effect.</value>
     <value>Busy</value>
   </data>
   <assembly alias="System.Windows.Forms" name="System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
+  <data name="AddClass" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>Icons\Custom\PNG\AddClass.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
   <data name="AddForm" type="System.Resources.ResXFileRef, System.Windows.Forms">
     <value>Icons\Custom\PNG\AddForm.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
   </data>
@@ -1534,6 +1537,9 @@ NOTE: Restart is required for the setting to take effect.</value>
   <data name="hourglass" type="System.Resources.ResXFileRef, System.Windows.Forms">
     <value>Icons\Fugue\hourglass.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
   </data>
+  <data name="skull_mad" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>Icons\Fugue\skull-mad.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
   <data name="Language_ES" xml:space="preserve">
     <value>Español</value>
   </data>