Changing first page number no longer immediately updates score

Issue type

UX/Interaction bug (incorrect behaviour)

Description with steps to reproduce

Changing First page number in Page > Page settings... no longer updates the score until the dialog is confirmed. Other changes in the dialog (margins, page size, etc.) cause the score to update immediately.

Supporting files, videos and screenshots

4.6.5:

https://github.com/user-attachments/assets/882e52d9-88d1-441f-9054-120590f4ef8f

4.7.0:

https://github.com/user-attachments/assets/fec3e38b-7c8a-4721-b06a-3aa3509f4973

In which versions of MuseScore Studio is this issue present?

4.7.0 - latest main

Regression

Yes, this works in the latest released version and is broken in the nightly builds

Operating system

Ubuntu 24.04.4 LTS

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

Start by reproducing the regression in Page > Page settings... on the latest main build, comparing the First page number field with margins and page size. Trace the dialog's score-update path and determine why this field waits for confirmation. Done means changing First page number updates the score immediately, consistently with the other settings, while the existing confirmation behavior remains intact.