LDEV-1182 & LDEV-1126: Fixing up behaviour of the close.jsp - which is called when the user completes an activity that was already finished. There were problems with the parallel activities when one was finished and the user clicked resume (or restarted learner) and with force complete. Now instead of just showing the "close" message, it detects that it is not in the popup window and instead of trying to close it now forwards to the next appropriate screen.
LDEV-1229: Add a unique key on the activity columns in transition. Somehow we are ending up with duplicate rows in the database, which stops the design being opened. This will stop the bad data being written to the database.
Updated how jabber room names are allocated.When a chat tool session is created, it is assigned a jabber room name.A 'room_created' boolean field was added to the lachat11_session table. This indicated whether the room has been created on the jabber server.
