OO-3339: move previous / next buttons to a separate controller to catch dirty form events, add some tricks to set the form as dirty for the override callout...

OO-3396: make the QTI 1.2 results export resilient to missing result XML of a particular participant

OO-3170: selenium test for reminder need a selectable license to save the details page of the course

OO-3170: selenium test for reminder need a selectable license to save the details page of the course

OO-3170: Application of the license service in the question pool incl. the necessary migration of the existing licenses

OO-3170: Hide licenses in full text search if disabled, info message when enable / disable license service, do not log missing license type translations

OO-3283: consolidate packages of RSS feed util and servlet for notifications, add and fix some missing i18n keys for notifications