PRG, 42157: Acknowledge all courses, remove legacy UI

[nhaagen]

https://mantis.ilias.de/view.php?id=42157

This removes the table(s) from the Acknowledge Courses GUI and adds as button to acknowledge all courses in the list.

[matthiaskunkel]

Jour Fixe, 14 OCT 2024: We recognise that this suggestion significantly improves the usability of the SP and accept therefore the PR for Release 8, 9 and trunk.

[klees]

@nhaagen Please prepare a version of this for release_10. Thanks!

[klees]

@nhaagen And for release_8 as well... Thanks!