OO-3332: the main calendar is always visible in its context (course calendar always visible in its course, same for group, user and home)

OO-3330: per default save the calendar setting with 'visible' and 'aggregated' like the defaults if there are no user configuration yet

Merge OpenOLAT 12.3 default branch to OpenOLAT default branch with 8ca32f8d672e28f62275de4728612b34c6b38505

OO-3323: Pool manager and pool owner should be able to remove question from pool, pool manager and group member should be able to remove question from group

OO-3317: break the spring dependency cycle to ensue the access control module set the settings on the database once initialized

OO-3312: hide the lost+found in the document pool site, exclude competence gained from a taxonomy level with the identifier lost+found or orphan-fach (inclusive parent line) to access the document pool site