Broadcast Round Selector: Default to last ongoing (or currently opened) round for scrolling

[AAArmstark]

If there are too many rounds in the broadcast round selector to be displayed without scrolling, the broadcast round selector seems to always default to start from the top at the moment, regardless even of the round which the user has currently opened:

But in this example, after scrolling down, an ongoing round appears at the bottom, which the user might miss:

(https://lichess.org/broadcast/fide-world-corporate-championship-2024--finals/tIeC6qCv)

I would suggest to default to the last ongoing round, or the currently opened round if there's no ongoing round, for the broadcast round selector scroll.