Comment 2 for bug 1882474

Linux Mint 19.3 (ubuntu bionic) amd mixxx 2.3.0-beta (build 2.3 r7443) F11 DOESN'T work.

If Mixxx starts in windowed mode do the following:

1. Click View - SELECT checkbox fullscreen ---> turns fullscreen on and check box appears selected correctly.
2. Close mixxx.
3. Rerun mixxx ---> it starts in fullscreen mode (correct since it was closed in fullscreen mode)BUT
4. Click View - checkbox Fullscreen appears UNSELECTED (faultly since mixxx is in fullscreen mode).
5. Click View - CLICK checkbox fullscreen ---> now appears selected and nothing else happens (mixxx is already in fullscreen mode).
6. Click View - UNSELECT checkbox Fullscreen ---> mixxx leaves fullscreen, returns to windowed mode as it should do.
7. Exit mixxx
8. Rerun mixxx ---> it starts correctly in windowed mode.

If mixxx starts in fullscreen mode start from step 4.

In all cases F11 DOESN't work at all no matter if it is in windowed or fullscreen mode.

So the problem is the faulty indication of checkbox when mixxx starts in fullscreen and F11 lack of operation