I guess I keep a few problems I'd love to revisit a year later in my favourites tab and I would love to be able to sort them by difficulty so that I could try to solve them all in order of increasing difficulty (similarly to https://codeforces.me/problemset?order=BY_RATING_ASC). Is that possible? For now, I think it's sorted regarding the time it's been added in the favourites list and I can't find how to change it.