Way to sync preview point across all difficulties

[denisntlfj]

'Sync metadata with all difficulties' button is a great addition but preview point needs a way to get synced too for exactly same reasons. Changing it on all difficulties either forces you to suffer or to use external programs for no real reason.

[peppy]

cc @bdach @Hiviexd I'm wondering how we should handle this one.

It feels like having it synchronise using the same button would be best. We also don't really show the preview point as a value anywhere. Maybe adding it on the song setup screen (in metadata? next to the audio track?) and then having it sync with the existing button would work best?

[bdach]

Timing tab seems like a more natural place to display it if anything.

Of particular note the ranking criteria already requires all difficulties of a beatmap to have identical timing and we have no sync button there either.

[Hiviexd]

syncing from the same metadata button sounds like the most straightforward approach, maybe I'd suggest having a sync button for background, audio, and preview point given that would also be useful.

tho, going the extra mile and having proper timing sync (includes preview which would be more natural as bdach said) would be a great win to have and less of a reason to use external tooling, but we'd have to make considerations on how we should sync timing without breaking green lines and object offsets.