Copy layer repaints to Deleted
Summary:
If a Toplevel has scheduled layer repaints, then we have to copy them
to Deleted as well. This can happen, for example, when a client loses
shadow right before it gets closed or unmapped.
Reviewers: KWin, graesslin
Reviewed By: KWin, graesslin
Subscribers: kwin
Tags: KWin
Differential Revision: https://phabricator.kde.org/D18786