On compliant Wayland compositors windows are matched to their .desktop files by comparing the appId window property to the name of the .desktop file without the .deskop extension.
Qt5/6 by default set this property to the basename of the binary (IE `yuzu`) which does not match the expected value `org.yuzu_emu.yuzu`. We can fix this and fix window associations on compliant compositors (like Plasma) by using the `setDesktopFileName()` function which will set the appId window property. This is a no-op on X11 so is safe to be ran without guards.
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