https://radio.wisp.place radio for my friends and i

Library shuffle improvements #18

Merged okami.mom
targeting master
Merged opened by and assigned to okami.mom
targeting master

Added a new set of indices for making shuffling on large libraries (at least ~25k songs) much faster, added a lock to shuffle operations to make sure spamming the button doesn't make stuff wonky and made it more clear in the queue control UI about the shuffling status.

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