I was thinking that in the sort/Group function we could add Mods in the list, like for example: None or any, Or have a grouping for each individual mod.
Why do we need this? Well it really isn't actually that necessary but I personally feel it would be more useful than the BPM grouping
Some people might want to find these maps that they have/ haven't used a mod on because it could help you either find maps you want to play mods with/try with more mods on a song you already have or It can simply help you find some of your played maps that you could possibly be proud of easier in the event you want to do something with your score like post it somewhere as a picture of video etc...
Edit: It would probably be best to have it sorted by amount of mods used, most at the top or something none at the bottom
I'm not really that good at making new ideas that great so if you think you have something to add to this than feel free
Anyways, thanks for looking over this idea