events: Deliver touch events that continue off stage (soft grab)
events: Deliver touch events that continue off stage (soft grab)

If a button press happen on stage and the pointer is moved outside
the stage while holding the mouse button, the motion and release
events are still delivered to actors. Do the same X11 soft grab
emulation for touch events.

https://bugzilla.gnome.org/show_bug.cgi?id=685589

jigpu/clutter,djdeath/clutter-android,ebassi/clutter,ebassi/clutter,GNOME/clutter,collects/clutter,djdeath/clutter-android,heysion/clutter-clone,djdeath/clutter-android,heysion/clutter-clone,collects/clutter,ebassi/clutter,heysion/clutter-clone,jigpu/clutter,Distrotech/clutter,jigpu/clutter,djdeath/clutter,jigpu/clutter,ebassi/clutter,Distrotech/clutter,djdeath/clutter,djdeath/clutter,djdeath/clutter-android,Distrotech/clutter,djdeath/clutter,jigpu/clutter,GNOME/clutter,heysion/clutter-clone,Distrotech/clutter,ebassi/clutter,djdeath/clutter,djdeath/clutter,collects/clutter,jigpu/clutter,Distrotech/clutter,djdeath/clutter-android,collects/clutter,Distrotech/clutter,GNOME/clutter,collects/clutter,heysion/clutter-clone,GNOME/clutter,GNOME/clutter