Feature request (mentoring): ignore specific exercises

I love the fact that you can narrow down the mentoring queue by exercise. It would be really great if mentors could configure things so that they never see specific exercises in their queue. There are a few that I am not comfortable providing feedback on, and having an uncluttered queue would make finding other ones a bit easier.

It’s a minor QOL improvement; probably low-priority, but wanted to get it out there.