SAK-23662 do not create hidden form items if they already exist


git-svn-id: https://source.sakaiproject.org/svn/reference/trunk@270754 66ffb92e-73f9-0310-93c1-f5514f145a0a
PRFL-848 - Some additional fixes for JQuery 1.9 support


git-svn-id: https://source.sakaiproject.org/svn/reference/trunk@305956 66ffb92e-73f9-0310-93c1-f5514f145a0a