SIGNUP-100 : NPE form SingupUIBaseBean, fixed for 2-6-x

git-svn-id: https://source.sakaiproject.org/svn/signup/branches/2-6-x@305480 66ffb92e-73f9-0310-93c1-f5514f145a0a
SIGNUP-115 and SIGNUP-116 : merged the changes in

git-svn-id: https://source.sakaiproject.org/svn/signup/branches/2-6-x@305502 66ffb92e-73f9-0310-93c1-f5514f145a0a
SIGNUP-117 : Create new meeting, then cancel - select another tool, then Signup - displays 'Create New Meeting' screen 

git-svn-id: https://source.sakaiproject.org/svn/signup/branches/2-6-x@305506 66ffb92e-73f9-0310-93c1-f5514f145a0a
add Spanish and GB message properties files: SIGNUP-131 and SIGNUP-113 to the Signup-2-6-x

git-svn-id: https://source.sakaiproject.org/svn/signup/branches/2-6-x@305552 66ffb92e-73f9-0310-93c1-f5514f145a0a