[BUG]: Wayland logo shown instead of PCSX2 logo on AppImage

[TheTechnician27]

Describe the Bug

On the PCSX2 AppImage main window and all child windows/widgets, the Wayland logo is shown in the top left instead of the PCSX2 logo. Apparently requires running from the .desktop file to fix, but a downloaded AppImage doesn't have this.

Reproduction Steps

Download latest PCSX2 AppImage and open it. Look in the top left, and you'll see the Wayland logo. Broken by the recent switch to Wayland #12333.

Expected Behavior

The PCSX2 logo should be displayed.

PCSX2 Revision

v2.3.168

Operating System

Linux (64bit) - Specify distro below

If Linux - Specify Distro

Manjaro

Logs & Dumps

[JakobDev]

Wayland has a new Protocol called XDG toplevel icon (currently only supported on KDE) which allows setting a icon without using a desktop file. Qt is adding support for this protocol in version 6.9, so the problem should be gone by then.