fix clearing Kwf.Utils.Element width cache
fix clearing Kwf.Utils.Element width cache

problem was if onContentReady passed an element that was cached itself (and contains didn't return true)

kaufmo/koala-framework,koala-framework/koala-framework,nsams/koala-framework,kaufmo/koala-framework,yacon/koala-framework,nsams/koala-framework,yacon/koala-framework,kaufmo/koala-framework,koala-framework/koala-framework,nsams/koala-framework,yacon/koala-framework