Implement soundfont dividers for dropdown instrument list in Mixer

While I was trying out my single-instrument soundfonts for the first time, I noticed during my initial setup that the instrument dropdown list in the Mixer had no dividers to separate one soundfont's instruments from another's. I attached a picture of the issue in action and another of my current list of soundfonts. By the time I'm writing this, I'm still setting up my new soundfonts, so I don't have a word on if the sound is alright or not. I hope I'm not missing anything obvious or am explaining my issue clearly. Do you guys think this divider and sub-soundfont feature would be well appreciated?

~Ethan

P.S. Will try to come back and check on this issue as it gets attention