That was a no and my reason why the option works as it does, I hope that makes it clearer as to why it's implemented this way. There are no two equally important sets of sprites - there's one main set of sprites, and there's bonus content. Preferences panel is endlessly expandable, but UI design guidelines still apply and I'm looking to make the UI cleaner over time instead of more convoluted. This is me being 100% honest and transparent here.
I'm happy that you found the option useful. I'm not doing community management as I barely have time to reply everywhere I might be needed; I wish I could be doing things differently in that regards, but with a project this big I can't be the public person people might wish I were.