Allow playing muted pattern in the piano roll

[Veratil]

An annoyance to me so far has been wanting to listen to a pattern I just opened from the Song Editor, but I've muted it beforehand for whatever reason. I am then required to click back to the Song Editor to unmute the pattern (I don't know if there's a shortcut key to unmute the pattern from the Piano Roll window) and then I can go back to the Piano Roll to listen to it.

This should allow the Piano Roll (and I believe any other editor which uses InstrumentTrack) to play its pattern while being muted on the Song Editor.

My next step I want to be able to do is play while the entire track is muted, since this PR doesn't fix that instance.

[Spekular]

I think PhysSong means that tracks muted *inside the bb editor* will still play, which is obviously undesireable. Otherwise you could have a kick/snare loop you're previewing in the BB editor, mute the snare track, and have the snare continue to play.

[Veratil]

I think PhysSong means that tracks muted inside the bb editor will still play, which is obviously undesireable. Otherwise you could have a kick/snare loop you're previewing in the BB editor, mute the snare track, and have the snare continue to play.

Ah! That's right. I just tested and that does indeed ignore the mute in BB Editor. Will fix. 👍