"Add state" button moves out of sight

1. Open a QML file in Design mode.
2. Click the "Add state" button to add a state.
3. Go to Edit mode.
4. Change the state's name to a couple of newlines:

       states: [
           State {
               name: "
   
   
   "
           }
       ]
   

   It looks ugly but it seems to be valid QML.

5. Go to Design mode.
   The state's preview and the "Add state" button have moved down.
6. Go to Edit mode.
7. Remove the whole states code.
8. Go to Design mode.
   The "Add state" button still is in the wrong place:
   

We may argue about moving the state's preview, but the "Add state" button should never move in vertical direction.