SIGNUP-216 mods for the selected coordinators

git-svn-id: https://source.sakaiproject.org/contrib/signup/trunk@84709 fdecad78-55fc-0310-b1b2-d7d25cf747c9
SIGNUP-217 change wording of default email notification label

git-svn-id: https://source.sakaiproject.org/contrib/signup/trunk@84710 fdecad78-55fc-0310-b1b2-d7d25cf747c9