LDEV-4123: Removing the highContrast theme that is no longer used. Users with this theme should now revert to the default theme. The code that handled invalid themes was not correct and was stopped users logging in - now if the theme id in the database is null or if the theme id points to a non-existent theme then it can still log in using the default theme, and next time the user updates their profile the theme id will be fixed.
LDEV-4109: Adding explicit comment style rating support to Peer Review. Also fixed problem with working out whether it was the first, second, last, etc rating which was causing the wrong combination of next/prev/continue buttons to be displayed.
LDEV-4109: Adding explicit comment style rating support to Peer Review. LDEV-4112: Fixing the previous button - was not detecting the prev case properly and always redisplaying the same screen.
LDEV-4109: Adding explicit comment style rating support to Peer Review. Also fixed a couple of counts that were not calculating correctly - the number of ratings done was being reported on all criteria in the lesson, not the individual criteria.
LDEV-4032 Non-leaders should be forced to wait for leaders to submit notebook and burning questions. Therefore they should not be allowed to press Finish button before these events.
