e:tiling: tiled windows shouldn't get maximised by users
e:tiling: tiled windows shouldn't get maximised by users

Refs: #1996

SVN revision: 81027

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