SIGNUP-240 :Crashes at goBack button during creation of new meetings

git-svn-id: https://source.sakaiproject.org/contrib/signup/branches/signup-2.10.x@85532 fdecad78-55fc-0310-b1b2-d7d25cf747c9
SIGNUP-225 : two signups with the same name will generate auto-signup groups with identical names 

git-svn-id: https://source.sakaiproject.org/contrib/signup/branches/signup-2.10.x@85533 fdecad78-55fc-0310-b1b2-d7d25cf747c9
SIGNUP-213 : Add student comment to email notification instructor gets of sign-up

git-svn-id: https://source.sakaiproject.org/contrib/signup/branches/signup-2.10.x@85534 fdecad78-55fc-0310-b1b2-d7d25cf747c9