SelectOneMenu filter key events

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@8992 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
New Feature

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@8995 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c