when the padding aroun the window changes, update
Summary:
update m_visibleRectBeforeGeometryUpdate when the padding
change signal gets emitted: aurorae updates its shadow
and postentially shadow size asynchronously after repainting.
that would make the first addRepaintDuringGeometryUpdates
when the winow is moved *for the first time* have a wrong
m_visibleRectBeforeGeometryUpdate that doesn't take into
account the shadow, leaving some leftover shadow on screen
BUG:377670
Test Plan:
shadow leftover not reproducible anymore with maui's kwinrc
replaces D4989
tested both on master and together D4990, which should go in as well
Reviewers: Plasma, davidedmundson, graesslin
Reviewed By: Plasma, graesslin
Subscribers: plasma-devel, kwin, KWin
Tags: KWin
Differential Revision: https://phabricator.kde.org/D5078