fix (kcm): correct output identifier position on wayland
Summary:
Wayland don't allow to update client position so we use PlasmaQuick/Dialog
PlasmaQuick/Dialog will talk to kwin throught plasma shell protocol to set dialog position
BUG: 385672
Reviewers: Plasma, romangg, davidedmundson
Reviewed By: Plasma, romangg, davidedmundson
Subscribers: romangg, davidedmundson, anthonyfieroni, plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D28817