Issue #2170621 by aivanov_100: "create node" and "use existing" should be paired.
Issue #2141447 by kyoder: Course outline items need more classes.
Issue #2141447 by kyoder: Course outline items need more accurate classes
Updated doxygen to use paths.
Set timestamp on object during enrollment
Removed arbitrarily set weights? Set weight of course object report to come after the overview.
Issue #2188361 by bvsneek: Fixed notice when adding an existing node to a course object.
Issue #2187835 by grigoriev: Trying to get property of non-object in function course_edit_enrollment_action_form().
Fixed failing test resulting from 66f5ea7. Removed assertion that will never happen.