no-jira: feedback, update QTI test after closing the editor, description not mandatory on copy, footer url in the middle text, double icons in passed / failed line of the details page of a course...

OO-1346: use a query to load a specific message to prevent EntityNotFoundException if the message was deleted

OO-1343: removed folder icons where unnecessary, added two-column layout for large and medium screens

OO-1343: add three different style choices to catalog, refactor the catalog admin, refactor the image pipeline of the catalog to reduce the number of scaling

	OO-1253: not assessable nodes and not published nodes return a score of 0.0 instead of the large negative number. If not assessed, no score seems logic but not a large negative value

OO-1342: refactor the loading mechanism for the custom media controller with a standard factory pattern