Fix rearrangeable lists don't react on collection Move events

[Feodor0090]

See added test.

[bdach]

Just for general information, can you provide context where you encountered this / what this is for?

[Feodor0090]

Just for general information, can you provide context where you encountered this / what this is for?

I have two screens with lists bound to single BindableList, i noticed that after i drag an item in one screen, list in the other screen doesn't update. Test shows this case.

[bdach]

So this is in some external project / un-PR'd code? It's not related to any issue in the game?

[Feodor0090]

It's not related to any issue in the game?

No, it is not related.

upd: it is, see below

[Feodor0090]

I had feeling that i saw cross-bound rearrangeable usages somewhere in osu!, well, i managed to find one.

2024-02-01.23-25-02.mp4

Exactly my use case: two screens, two bound lists. Notice that when i move "easy" diff down, it's still on top when i return to playlist setup screen.