Note move and note deletion actions are undone together if originally performed during piano roll playback

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### Bug Summary
If a note is deleted after a different note is moved in the piano roll during playback, attempting an undo will treat both discrete actions as a single action, undoing them both. Similarly, subsequently attempting a redo will restore both actions together. Half of the time it seems to work.
#### Steps to reproduce
1. Place notes on the piano roll.
2. Begin playback on the piano roll.
3. Move a note and then delete another note.
4. Attempt an undo with Ctrl+Z
#### Expected behavior
Only the note deletion is undone.
#### Actual behavior
Both the note deletion and the earlier note move are undone together.
#### Screenshot
https://user-images.githubusercontent.com/6764216/224560441-41873393-96b2-413d-a65c-711d5718e557.mp4
#### Affected LMMS versions
1.3.0-alpha.1.277+g2baa23ee1 (win32/x86_64, Qt 5.9.8, GCC 7.3-win32 20180312)
Windows 10 64-bit

Reproduce the issue in the piano roll using the listed playback, move, delete, undo, and redo steps. Trace the piano roll's undo/redo handling while playback is active; done means the deletion and earlier note move are treated as separate actions in both directions.

Written by the indexing model from the issue text.