Save speed/pitch for song

[Monoxide8969]

Add a "save for this song" button in the Speed & pitch dialog popup, to the left of the confirm button.
This remembers the setting for that single song. That's it.

A couple of side stuff from ux perspective

• How the sliders are set on the screen (the "global" speed/pitch setting) should be prioritized over the custom speed/pitch preset. (I hope I made myself clear on this one, lmk if I need to elaborate on this)

• if speed/pitch are set to 0, the "save for this song" button becomes "reset for this song"

• if a song has a custom speed/pitch assigned to it, the little gauge indicator should appear somewhere in the player, maybe on top of the song title, or where i put the red x (just a couple ideas). Clicking on it may or may not pull up the speed/pitch menu, I don't know if it's best to leave it as an indicator or making it a button.

I realize this is pretty niche, but I'd like to see it implemented.

[25huizengek1]

I like the idea, I'm not sure if this makes sense, as it would complicate the menus even further. I'll put this on low prio.

[Monoxide8969]

I don't think it would complicate menus more than #261