$m (Last modification time) updates when file isn't modified

Issue type

Other type of issue

Description with steps to reproduce

Steps to reproduce:

1. Open a new default score (Home, Scores, New score, Create from template, Done).
2. Go to Format > Style... > Header & footer.
3. Enable "Show on first page", and disable "Different odd/even pages".
4. Enter $m in one of the header fields, and click OK.
5. With the trackpad (or scroll wheel, etc.), scroll/pan around the score a few times, but don't enter any notes or otherwise modify the score.

Observed behavior:

The seconds in the header time update to the current time each time the user stops scrolling.

Expected behavior:

The "Last modification time" should not change unless the file has actually been modified.

Supporting files, videos and screenshots

https://github.com/user-attachments/assets/4529a73e-1748-4b39-8236-838dcaa4f27f

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

OS: Ubuntu 22.04.5 LTS, Arch.: x86_64, MuseScore Studio version (64-bit): 4.6.0-251440316, revision: github-musescore-musescore-42be613

Regression

I was unable to check

Operating system

Ubuntu 22.04.5

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