[MU4 Issue] Hiding top note of a chord on extra staff line causes every extra staff line to be hidden

[LuisLiszt]

Describe the bug
See screenshot. When you hide a note of chord the "extra staff lines" will get invisible, causing the visible notes to "fly" above the staff.

To Reproduce
Steps to reproduce the behavior:

1. Place a chord with notes above the usual staff.
2. Hide a note thats ON a extra staff line.
3. See the bug.

Expected behavior
Only the extra lines which are not needed to display the whole visible chord should be invisible.

Screenshots
Top note hidden:

Additional Context
Doing this is needed for something like this: https://musescore.org/de/node/277181 .
This is also a problem in MS3, so I think MS4 should make it better. Also the stem, which connects the top note with the rest of the chord should get invisible, so theres no rest of a stem on the final sheet.
Workaround to this bug was to just place the note in the second voice and hide it. However I think fixing this will improve user experience.

[MarcSabatella]

This has been debated in the past, with use cases existing for either behavior. Not so much for full chords, but for single notes. Probably there really needs to be a "show ledger lines" checkbox for chords to handle all cases.

This particular use case, though - creating a fake note for trill purposes - is better solved right now using a separate voice. Eventually of course, better still if trills supported accidentals directly.

[oktophonie]

See also the related #16665

As discussed in several other places, we should implement options (which can be specified for each chord - or, arguably, for each note) for how to treat the hiding or showing of ledger lines:

• hide all
• show all
• show only for visible notes

And, which is connected, we should be able to specify for any given chord whether its stem should extend to include invisible notes or not.

[worldwideweary]

There's also the question of the stem - extending to the hidden note or not. Personally would never want that, nor desire hidden ledger lines to be hidden within the domain of visible notes. Example from personal build (purple is invisible):

Slight issue there though is not showing a second "invisible" stem when showing hidden stuff on score, but that could be done by drawing an extra stem-line between cut-off and extreme-point as invisible). Worth mentioning for whomever might implement that in version 4...

[Jojo-Schmitz]

Came up again in https://musescore.org/en/node/369555