Relax the reqirement in which order events are delivered.

Relax the reqirement in which order events are delivered.

When the pushbutton is shown, it will generate both a ShowEvent and
a StateChange with active=1 (because it is a top level window).

This patch relaxes the reqirement in which order events are delivered.

Ideally the order should also relied on, but I'm not sure if that
is feasible due to differences among window managers across all
platforms.

This got provoked by codereview.qt-project.org/#change,26014

Change-Id: I96159fbb1b64f0ca8d13833d8a4c6799c655afc2
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@nokia.com>