temp/plasma*: fork from Alpine to upgrade to 5.20.90
This includes a big rewrite in kwin which should increase the performance a whole lot, and some awesome other stuff.
One important thing to test is if virtual keyboard input now works with GTK+3.0 applications, e.g. Firefox. Where it didn't before, it should now.
Contributes to #506 (closed)
Edited by Alexey Min