--in the initial design there was only a line for the
active task and the user could choose if wants to show
a second dot to indicate that this is a group of windows.
This behavior was updated in order to take into account
if the user has chosen to show only dots even for the
active task.
--following issue from #730 more qml code
was found that wasnt releasing connect signals
properly. That could create crashes because
already deleted qml objects could receive such
signals. That was observed after qt>=5.9.2