Only show close button when full screen

[DonLakeFlyer]

Related to #12091

[DonLakeFlyer]

@NiklasVoigt Can you give this a try on a SteamDeck once it builds?

[NiklasVoigt]

@DonLakeFlyer can you provide an appimage?

[DonLakeFlyer]

YOu can get it here: https://github.com/mavlink/qgroundcontrol/actions/runs/11863725486?pr=12099

[HTRamsey]

@DonLakeFlyer I've realized this close button bypasses the "Are You Sure" checks when you are connected

[NiklasVoigt]

@NiklasVoigt Can you give this a try on a SteamDeck once it builds?

It works as intended: In fullscreen mode, a close button is available; otherwise, there is no close button.

[NiklasVoigt]

@DonLakeFlyer I've realized this close button bypasses the "Are You Sure" checks when you are connected

i think the button should better use checkForActiveConnections() instead of finishCloseProcess() ?

[DonLakeFlyer]

OK, I’ll fix that

[DonLakeFlyer]

@NiklasVoigt Can you test this again when it finishes building. I fixed the close sequence to always do the shutdown checks.

[NiklasVoigt]

The functionality is as expected. On PC, no button is visible, whereas on the Steam Deck, a close button appears when in fullscreen mode.

[DonLakeFlyer]

Great, thanks so much for helping out