Setting a nested widget to full-screen mode causes unexpected behavior

[cbcode1]

Describe the bug
When having nested components, toggling full-screen mode in the inner widget while being in WebWriter's editor leads to unexpected behavior. In some cases, it leads to the whole editor turning black except for the title bar.

To Reproduce
Steps to reproduce the behavior:

1. Insert a widget that allows nested content (e.g. Interactive Video, Quiz, Slides)
2. Insert a widget that supports full-screen mode into this widget (e.g. Automaton, Block Based Code)
3. Activate full-screen mode of the inner widget
4. Notice the unexpected behavior

Screenshots

Desktop (please complete the following information):

• OS: Windows 11
• WebWriter Version 1.9.3