OO-2421: enhance the cycle detector to only check expert rules method which have a risk to create a cycle

OO-2419: fix issue with the increment of attempts in a QTI 2.1 course element where the user doesn't reload the course element

OO-2409: properly set a right margin for the help and subscription to let enough place for the open button

OO-2043: add message under the toolbar is a course is freezed, better handler changes of status, reload course element by status changes...

OO-2371: check if the participant is in group of a enrollment element before allowing it to leave the course

OO-2402. don't try to launch a resource if there is nothing to launch, hardened the authentication dispatcher to accept manipulated urls and redirect them to the current page