Table: When skipping a non-focusable actor, respect the actors span
Table: When skipping a non-focusable actor, respect the actors span

Non-focusable actors would break the focus chain if they spanned more than
one cell. Take their span into consideration when finding the next actor in
the chain

Fixes: http://bugzilla.meego.com/show_bug.cgi?id=1138

jonnylamb/mx,jonnylamb/mx,pwithnall/mx,clutter-project/mx,pwithnall/mx,jonnylamb/mx,pwithnall/mx,pwithnall/mx,clutter-project/mx,clutter-project/mx,jonnylamb/mx,clutter-project/mx