Rename midi controlers

Because we use more and more midi controlers with more and more virtual instruments, it could be easier to give a relevant and clear name at each midi controler. It would be more comfortable to see, for example, Vibrato or Xfade better than controler 21 or 32… in key or drum maps editor views. Due to the fact that each Vi has its own midi controlers maps, these information could be put as an add on of the expression map…

I’ve wanted this since the beginning.

+1 !!