Fix edit.js not being able to delete after creating entity

This fix puts focus back on the main window when creating an entity so that the user can use shortcuts like 'f' and 'delete'

scripts/system/edit.js

@@ -392,6 +392,8 @@ var toolBar = (function () {
         entityListTool.sendUpdate();
         selectionManager.setSelections([entityID]);
 
+        Window.setFocus();
+
         return entityID;
     }