messageTray: Check monitor fullscreen using a monitor constraint
This commit fixes the full screen check when notification is displayed if the monitor has been changed using a MonitorConstraint
.
The problem is that if the monitor for notifications has been changed, the _updateState()
function still checks full screen mode on the primary monitor.
Fixed this by finding the current monitor by MonitorConstraint
properties.
This changes did't break the commit 023b50e7