Appsettings: Enabling Fullscreen feature requires app restart, but no indication is given

[Daniel Kulesz]

How to reproduce:
- download and launch revager
- choose "open existing review"
- click on one of your previous reviews and confirm opening it
- open Application Settings
- enable the "Full screen (experimental)" Feature
- go to protocol mode

Expected behavior:
- the button "full screen" is available and allows to change into fullscreen mode

Actual behavior:
- the button "full screen" is not available - it shows up after application restart, though.

[Johannes Wettinger (jojow)]

Problem is fixed in trunk. :)