bug#48413: 28.0.50; emacs does not repaint the window after switching workspaces in Xmonad

[martin rudalics]

> I propose that we include your patch as is (since it keeps the
> behaviour you need and fixes the issues - hopefully Basil's issue also
> goes away).

I pushed it now.

> All the SET_FRAME_GARBAGED and has_been_visible manipulations don't
> seem to be immediately relevant - redrawing works fine without it. And
> we shouldn't just copy-paste code with unknown purpose :)

Please keep your additional changes ready so we can apply them as soon
as we find more problems in this area.

Thanks again for the analytics, martin