Greasy Fork镜像

- Added volume percent display from native volume bar tooltip
- Fixed volume bar not appearing after switching from an offline stream
- Fixed not unmuting on volume up when volume already maxed
- Minor cleanup

Support latest twitch changes

Has to look deeper to find player ¯\_(ツ)_/¯

Adapted to latest twitch player volume bar modifications.

Fixed player overlay appearance by changing volume from idle mouse.

Unmutes on wheel up/down.