bugfix: initial client positioning with multiple monitors improved
bugfix: initial client positioning with multiple monitors improved

this was added a while ago to fix positioning of windows that wanted to start centered but couldn't accurately calculate xinerama screen sizes, resulting in windows getting centered across the screen split. it ended up being a bit too aggressive, however.

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