Add ui-widget to panelmenu header

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@11184 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Fixed #6898

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@11185 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
enablePlugins to false, fixes metergauge issue

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@11186 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Cleanup after preRender

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@11187 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
A bit safer for time being.

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@11188 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c