Fix #896 - set multi_user = True so the "share" link does what it says it will do
Fix #691 - Add the filename, and then the title, of the interview in progress to the session list so it is simpler to locate the interview you were in the middle of working on.
Filter the list of sessions in the "Load a previous project" list so it only shows interviews past page 1.
multi_user = True
so the "share" link does what it says it will do