Add a close button to the toolbar in the main GUI

[QuickBASIC]

Role

Running Prism Launcher on SteamOS (in Wayland instance with no window decorations)

Suggestion

Add a close button to the toolbar in the main GUI

Benefit

So I can more easily close Prism Launcher without killing it outside the app

This suggestion is unique

• I have searched the issue tracker and did not find an issue describing my suggestion, especially not one that has been rejected.

You may use the editor below to elaborate further.

On SteamOS, when running PrismLauncher from Game Mode, it is run in an instance of wayland that does not include window decorations, which means that there's no easy way to close it when running on the Steam Deck. The "File" menu also does not include a Close or Exit option, meaning that the only way to exit Prism Launcher is by returning to the Steam Deck game mode and selecting "Exit Prism Launcher", which sends a sigterm.