Brass Fingering and Trombone slide position

This plugin was made by Alexander Schwedler in 2016. I've only updated it so it can work on MuseScore3. I have updated it through a pyton script.

I'm no developer, just trying to help the community. And it's actually working on my musescore 3 appimage (linux). I hope it'll work for you too ;-)

// Copyright (C) 2016 Alexander Schwedler