MOD: Relax requirement that the target of a window alias exists before creating the alias (aka: late binding of window aliases).
MOD: Relax requirement that the target of a window alias exists before creating the alias (aka: late binding of window aliases).

cbeck88/cegui-mirror-two,cbeck88/cegui-mirror-two,cbeck88/cegui-mirror-two,cbeck88/cegui-mirror-two,cbeck88/cegui-mirror-two