When the autoscale disablement state of a control changes such that
native zoom of the control is modified, no ZoomChanged event has been
sent yet. In case a consumer has created some state on top of the
Control that depends on its zoom (such as a GC), this state may become
inconsistent.
In order to allow a proper update of that state, with this change a
ZoomChanged event is sent like in every other case in which the zoom of
the control changes.