fixed #7593

git-svn-id: https://primefaces.googlecode.com/svn/primefaces/trunk@11981 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Added showUnselectableCheckbox option

git-svn-id: https://primefaces.googlecode.com/svn/primefaces/trunk@11984 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
bugfix on cookie management

git-svn-id: https://primefaces.googlecode.com/svn/primefaces/trunk@11986 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
better cookie management

git-svn-id: https://primefaces.googlecode.com/svn/primefaces/trunk@11987 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c