Add shadow to floating panels and better de-float
This:
- Adds a shadow to the floating panel
- Makes the de-floating not thicken the panel at all
Needs:
plasma-workspace!3249 (merged)
https://invent.kde.org/frameworks/plasma-framework/-/merge_requests/880
BUG:470867 FIXED-IN: 6
Edited by Niccolò Venerandi