add Course-Prof review aggregate view #3
Description
right now there's view-by-course and review-by-prof, but a very common use-case is to want to see only review info for this course-prof pair.
the functionality's basically all there on the course page already, AND that page gets passed offering_id as a query parameter whenever possible.
solution: when offering id is passed, just use this prof-course group's review info, BUT add ALL the info into hidden divs in the page, and show on a "show all for this course" click. just...color the specific comments differently than the all-course comments.