--the previous code was updating the delayed application
data for each instance of lastactivewindow separately.
The new code is implementing this at the central
WM::WindowsTracker and just informs last active windows
to update their values
--when an application is tracked from the lastactivewindow
infrastructure it is updating the application name/icon
1500 ms after its first startup in order to fix apps cases
where they update their StartupWMClass a bit delayed
BUG:413671
--draggingStarted signals/slots were used in order
to handle the active window dragging from empty areas.
The new approach ungrabs the mouse properly through
View relevant function and at the same time sends a
QEvent::Leave event to inform applets that the mouse
has left the view. This is enough in order to remove
any older draggingStarted workarounds and hacks.
Michail Vourlakos