Click selection defaults to wrong voice on shared noteheads

Issue type

UI bug

Bug description

In MS3, when you click on a shared notehead, the voice 1 notehead is selected.

If you shift + click on the shared notehead it selects only the range equivalent to the duration of the voice 1 notehead.

This is invaluable as it allows you to immediately adjust the pitch by moving both voices of the shared notehead in tandem with the keyboard arrows

In MS4, this has changed. When you click on a shared notehead the selection defaults to the voice 2 note.

And if you shift click the shared notehead, the selection defaults to the voice 2 duration:

This is a critical difference because now the selection is not confined to the shared notehead but also includes one or more subsequent notes (note that in guitar music, particularly fingerstyle, voice 1 in shared noteheads is usually of a smaller duration than voice 2 )

It may seem like a small thing, but actually it's a significant loss of utility from MS3.

Steps to reproduce

1. Open the attached score in both MS3 and MS4.
   default_select_voice.zip

2. Shift + click on a shared notehead and use the keyboard arrows to move the pitch up and down.

RESULT: In MS3 you only move the shared notehead (good). In MS4 you end up moving one or more subsequent notes as well (not good).

MuseScore Version

MS 4.0.2-230651545, revision: github-musescore-musescore-dbe7c6d

Regression

Yes, this used to work in Musescore 3.x and now is broken

Operating system

Linux Mint 20.1 Cinnamon