Linux taskbar icon

[TechnicJelle]

The Linux version has an icon in the window

But not on the taskbar

That should be fixed.

[nightowl286]

The title bar icon doesn't seem to appear in this case, relevant issue for the title bar #99.

[TechnicJelle]

In 1150dd2, I added more icons, which results in icons appearing on the taskbar on some setups. (Including my own)

Reportedly, not all setups have benefitted from this, though.
Wayland likely does not accept this.