Hi there!
Same as project and mixer windows, allowing to show / hide channels instead of individual events, as well as being able select the current recording channel and lock the midi editor so it doesn’t keep changing all the time when working along in the project window.
I usually deal with tons of midi tracks (orchestral kind of thing), and it really is very frustrating the fact that each time I click something on the project window to do some small edit, I have to go back and re-select all the events I was previously working on.
Same for recording, it is a constant mouse jumping to go from the Midi to the Project editor.
Thanks!