Change to "Play mode" doesn't update drop-down menus

Test steps:

Open editor application and create a project

Add one slide to project

Choose Play Mode for Slide1 to be 'Play through to'

-> Palette doesn't update so that user could choose slide number or 'next' from another drop-down menu

Update happens if user clicks for example Slide2 open and then goes back to Slide1 -> "Play through to" menu now showing