no-jira: add alias in course xstream configuration of AttributeEndswithOperator for backwards compatibility with OLAT 7.8

OO-2038: add upload access rule in briefcase course element if the element use a shared folder which is not read-only

OO-2011	: save access settings in goto training element, escape message titles in table of the forum element

non-jira: fix display or velocity code in peekview when no-access message of a node is empty and not accessible

OO-2037: allow coaches and authors to upload and create tasks / solutions in the run view of the group task course element