Edit Drumset Shortcuts Don't Update immediately

[zacjansheski]

Issue type

UX/Interaction bug (incorrect behaviour)

Description with steps to reproduce

1. Edit Drumset with shortcuts set
2. Set a shortcut to a different sound
3. Shortcut appears duplicated, does not update until close

In MS3 the shortcut letters do not appear twice

Supporting files, videos and screenshots

drumconflict.mov

What is the latest version of MuseScore Studio where this issue is present?

Master

Regression

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

Operating system

All

Additional context

No response

Checklist

• This report follows the guidelines for reporting bugs and issues
• I have verified that this issue has not been logged before, by searching the issue tracker for similar issues
• I have attached all requested files and information to this report
• I have attempted to identify the root problem as concisely as possible, and have used minimal reproducible examples where possible