LDEV-3509 *Store blank burning questions. In this way other groups will see these empty burning questions. Besides, non-leaders will be able to move on once leader submits empty burning questions (and not after he's finished the activity)*Fixed Students stuck in Scratchie when leader submits empty burning questions
LDEV-3491: Deleting a learning design no longer removes it from the database. Now it flags removed = true. Calls to get the learning designs in the DAO layer ignore rows where removed = true. Cleaned up some methods in the DAO layer that are no longer used.
LDEV-3491: Deleting a learning design no longer removes it from the database. Accidently removed one too many methods from the interface - putting it back.
