Fixed overlaypanel demo

git-svn-id: http://primefaces.googlecode.com/svn/examples/trunk/showcase@11137 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Fixed column width issue

git-svn-id: http://primefaces.googlecode.com/svn/examples/trunk/showcase@11138 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c