Consolidate undo-points for changing note-pitch
When changing note-pitch with up/down-arrow,
I'd like undo-points to be consolidated.
So, going from b to e, then undo, would require 1 undo, not 5 as today.
There should be a time set for this, like 2 seconds,
so going from b to c#, then later to e would have better chance of creating 2 undo-steps.