Links to problems can be broken on Statistics page. #1617
Description
The statistics page contains multiple links to the problems in a set. These links all assume this is a homework set and that the set is assigned to the instructor viewing the statistics. Thus they are broken links if the set is not assigned to the instructor or the set is a gateway quiz.
I was going to fix this for gateway quizzes, but then noticed the issue with the sets not being assigned to the instructor. I think it is better to discuss what we want these links to do before fixing them. I am currently leaning to the idea that the links should work like the problem editor does with gateway quizzes and just open the problem in an unassigned set so they can be seen.
This also lead me to find another issue. The set/problem editor cannot view problems in homework sets that are not assigned to the instructor but can view gateway quiz problems. This is due to that with versioned gateway quizzes, it is possible to view an undefined set. It might be useful to have homework set problems work in a similar way when not assigned to the instructor editing the problem.