check current active element before re-focus after ajax request

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@10060 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Moved disabledSelection to DataTable

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@10061 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c