Note::layout10 doesn't use undo

I don't know if this is the right place to ask this kind of question, but since I don't know a better one...

Open attached score:
1. tie the c of measure 1 to the one in m. 2
2. undo

the courtesy accidental of the c in m.2 is not restored.

In Note::layout10 accidentals are computed quite similarly to Note::updateAccidental. However, since in layout10 no undo functions are called, we get the undo inconsistency.

Shouldn't these two functions be merged? Or is there a reason why Note::layout10 does not use undo?