shelf config updates: disable contents button when no item selected, actually save contents button, allow multiple shelf config windows, show only shelves for the current desk and screen
shelf config updates: disable contents button when no item selected, actually save contents button, allow multiple shelf config windows, show only shelves for the current desk and screen


SVN revision: 72867

FlorentRevest/Enlightenment,rvandegrift/e,tizenorg/platform.upstream.enlightenment,tasn/enlightenment,tizenorg/platform.upstream.enlightenment,tizenorg/platform.upstream.enlightenment,FlorentRevest/Enlightenment,tasn/enlightenment,rvandegrift/e,FlorentRevest/Enlightenment,rvandegrift/e,tasn/enlightenment