Summary:
The PanelBehavior was incorrectly mapped to hasStrut resulting in too
many modes creating a strut for the panel.
CCBUG: 368499
Reviewers: #kwin, #plasma_on_wayland
Subscribers: plasma-devel, kwin
Tags: #plasma_on_wayland, #kwin
Differential Revision: https://phabricator.kde.org/D2788