Enhancement: Note-entry - move to previous chord

[worldwideweary]

Keyboard user observation:

1. Note Entry - Switch to voice two when there isn't a voice two rest but there is in the previous measure
2. User can't move left to select voice-2 rests. Probably "by design" but I don't like it:
3. Option: User can use Prev-Element (alt-left) to do so but can't do so in note entry so exit note entry, alt-left a few times, then
4. Back to note entry again. Either that. or move to the left measure and switch voices and then move forward to the designated area:

Navigation.webm

Seems kinda lame and imo would be better to allow this:

Navig2.mp4

[Jojo-Schmitz]

Is this a regression vs 3.6? Or something that works better in Mu4?

[worldwideweary]

Neither, it's just an improvement for note entry in "3.7". trying to make sense of some of my older personal build changes because there's like 200+ commits with many bound up for multiple purposes, often for improved (from my perspective) note entry and navigation with the keyboard. This would be one of the little ones

[Jojo-Schmitz]

So you plan for a PR on this?

[worldwideweary]

Yeah I'll try it out actually right now and you can test it out sometime later or whatever

[worldwideweary]

Oh, found a problem/regression with #605 because it uses nextChordRest(track, true); which doesn't consider grace notes. Grace notes are then skipped while in note entry mode using "Previous chord" :-/

Have a fix....
Found the problem when realizing that likewise you can't be in "Voice-2" with no CR and then use "Previous Measure" command... doesn't do anything (it's always been that way in 3.6.2 etc). I'll get a PR to also allow that and fix the problem
a little later