To be used in the editor, for the beatmap submission wizard.
I've recently been on record for hating "abstract" as a rationale to do
anything, but seeing this commit ~3 months after I originally made it,
it still feels okay to do for me in this particular case. I think the
abstraction is loose enough, makes sense from a code reuse and UX
consistency standpoint, and doesn't seem to leak any particular
implementation details. That said, it is both a huge diffstat and also
potentially controversial, which is why I'm PRing first separately.
It was clipping the daily challenge completion checkmark, and it
originates in some veeeeery old code where the profile overlay looked
and behaved very differently (0fa0271878).