Only insert new instructors to course roster GH3157
When an instructor signs up for a workshop or field trip then they are automatically added as an "Instructor" at the course level, I believe this is new functionality. However, if that person is already set as a course "Leader" then they are demoted to be a course "Instructor". It seems like the new automatic behavior should only happen if the person is not currently on the course roster.
Completed Feb 2020.
Ref: Make field trip/lecture instructors push to course roster, http://feedback.mountaineers.org/forums/273688-general-feedback/suggestions/34126180-make-field-trip-lecture-instructors-push-to-course