Changes: Fixes animation on non X11 platforms.
Changes: Fixes animation on non X11 platforms.

RevBy: TrustMe

Details: MWindow by default is not on display, and on X11 windows get
visibility signals. However those signals are not needed on other platforms.

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