Fixes: NB#173114 - Adding QGraphicsProxyWidgets adds windows
Fixes: NB#173114 - Adding QGraphicsProxyWidgets adds windows

RevBy: TrustMe
Details: If a widget is attached to a proxy widget, don't treat it as a window.

nemomobile-graveyard/libmeegotouch,nemomobile-graveyard/libmeegotouch,nemomobile-graveyard/libmeegotouch,nemomobile-graveyard/libmeegotouch,nemomobile-graveyard/libmeegotouch,nemomobile-graveyard/libmeegotouch