Summary:
From the famous category: "How could that code ever have worked".
Maximized state changes were never passed to window decorations. For
X11 windows the decoration updated the state nevertheless, for Wayland
windows the state did not get updated, thus a maximized window had
borders and was shown with a not maximized button.
Reviewers: #kwin, #plasma_on_wayland
Subscribers: plasma-devel, kwin
Tags: #plasma_on_wayland, #kwin
Differential Revision: https://phabricator.kde.org/D1805
The added test exposes the problem that a shell surface might request
being maximized and then provide an incorrectly sized buffer. In this
case the ShellClient is incorrectly considered as maximized.
I don't have a good idea how to address this yet, but still publish
the test case exposing the problem.
