kcolorschemewatcher: make changing colour schemes work as expected on macOS
Introduce a short delay before emitting the signal, as for some reason NSAppearance.currentDrawingAppearance
is not updated fast enough.
It's not pretty, but I'd rather have the switch working as intended instead of being broken or not implemented at all.
Before this patch:
Screen_Recording_2022-10-11_at_23.12.14
after this patch:
Screen_Recording_2022-10-11_at_23.07.07