player: Center controls on "fullscreen" event
player: Center controls on "fullscreen" event

Under certain circumstances, the controls can be oversized wrt. the
actual display size because the panel size was determined with older
(smaller) stage size. Anyway, this patch resizes controls to fit the new
stage size, on "fullscreen" event.

skinkie/clutter-gst,ystreet/clutter-gst,lubosz/clutter-gst,lubosz/clutter-gst,GNOME/clutter-gst,GNOME/clutter-gst,lubosz/clutter-gst,skinkie/clutter-gst,ystreet/clutter-gst,ystreet/clutter-gst,GNOME/clutter-gst,ystreet/clutter-gst,skinkie/clutter-gst,GNOME/clutter-gst