First part of https://github.com/ppy/osu/issues/36039, see also
https://github.com/ppy/osu/discussions/33784.
The goal is to add this back to the set panels too, but that one is more
complicated than this if you can believe it (because it requires being
able to tell which other difficulties of the set are filtered out to
fade them out). I also foresee the display logic to vary significantly
there.
Of note, for this to work in beatmaps-split-apart mode, this requires a
change of behaviour in the filtering logic. Old song select when given a
"selected beatmap set" would *include* that in results regardless of the
filter, but that doesn't work for beatmaps-split-apart for reasons that
are hopefully obvious, so this changes the behaviour to *entirely
bypass* the filter and just show the set. Unsure how angry will people
be with that.
Also of note, when in the scoped mode, altering any filter criteria will
dismiss the scope.
Bartłomiej Dach
5bf6a75b50