Right edge of UI sometimes spills outside of window bounds

Issue type

UI bug (incorrect info or interface appearance)

Description with steps to reproduce

Simplest scenario:

1. Click the 'Workspaces' button in the bottom bar
2. Click 'Edit workspace'
3. Reset the current workspace
4. See that the arrow button next to the zoom level has been cut off in the bottom right corner of the window.

This can be fixed by resizing the window.

When you've completed the above steps without yet resizing the window, if you move a side-docked panel to the right, they are cut off by ~20px on the right side too.

I have noticed this issue before via circumstances unrelated to resetting the workspace, but these are the easiest reproduction steps I could find.

Supporting files, videos and screenshots

https://github.com/user-attachments/assets/e66c3732-770a-4761-8e3f-f8557d7d7dcc

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

Master

Regression

Not sure

Operating system

macOS 15

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