Cannot switch sidebar content via mouse

Steps to reproduce:

1. Launch Creator
2. Try to change the sidebar content, e.g. from "projects" to "outline" by  clicking on the selector
3. In the now opened list, click on any of the entries

Expected behaviour:

• Creator changes the sidebar content to the selected entry

Observed behaviour:

•  Nothing happens

Further notes:

• Using the keyboard to navigate between the entries and to select one after step 2 still works