on Android, touching results in two "mousePressEvent"s in QGraphicsScene

Touching in a QGraphicsView results in two "mousePressEvent"s being delivered to the corresponding QGraphicsScene on Android.

Attached is a very simple project which demonstrates the issue. Every time the screen is touched, QGraphicsScene::mousePressEvent() is called two times.

This is a serious problem if you want to use QGraphics(View|Scene) to render custom controls which should trigger some kind of action when pressed.