The course editor before 4.0 had non-Javascript alternatives for moving an activity, which introduced a lot of complexity to the code. When a user clicks on "Move" without Javascript, the page is reloaded, and many dotted elements identified with the "move here" CSS class appear all over the place.

It has been many years since Javascript was not optional in Moodle (I cannot remember when, but it was probably about 10 years ago). However, the "move here" code is still there even if it is not used anymore. All "move here " uses have been replaced by the new move modal, which is more accessible and useful. Now that all core formats are migrated to the reactive editor (MDL-82351), it is about time to clean all this logic.

In this issue, all the "move here" logic and CSS from the course format will be removed, and all the related methods will be deprecated. Also, it removes the section actions to move up and down a section without ajax.