GitLab

keep all windows minimized except the active one and minimize everything
when the task manager is open

FIXME

the panel still looks the same

As a nice side-effect this allows us to enable/disable the close button
depending on whether we have a window to close.

Introduces new dependency on KWayland and uses it to try to resolve the
PlasmaWindowManagement interface. If available that's used to trigger
showing desktop state.

sliding panel logic moved to the phone panel containment

things in the panel are actually justy qml, the applets are in a tabbar in the
sliding thing