[FIX] perms: Select hidden groups when clicking select all checkbox, but others (like the huge perms list) only affect the visible ones (re wish4835, thanks marclaporte)

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@48305 b456876b-0849-0410-b77d-98878d47e9d5