OnDisable stops all preview clips

[khiemgluong]

Simple one line method that just stops preview audio clips from playing using EditorAudioClipPlayer.StopAll()
when the Audio Library window closes. I personally find it annoying that it keeps playing but it's up to you to decide

[JonathanMCarter]

Yea, this seems like a nice little QOL update. I'm happy to add it in. I've just updated the target branch to contribution instead of main. I'm a bit behind on the admin of some projects, this repo was one of them.

Will get this merged into an actual release within the next couple of weeks. Should be next week if all goes to plan.