Lock MIDI notes/events

Hi,

Many times I need to lock midi notes during my composition process. We can have a new lock option or in the information bar. I suppose in the key editor and score editor and project we can have color or other visual cues to tell if they are locked.

Use cases:

  1. you tweaked the chords from a track(s) that follow chord track and would like to keep them
  2. you want to transpose scenario as in here.