Impossible to change a local time signature if the following bars have content

Issue type

UX/interaction

Description with steps to reproduce

1. Add a local time signature on a measure of a staff that has no more content after that measure
2. Add some content while letting an empty measure in-between the content.
3. Try to re-change the local time signature on the empty measure
   => ERROR : the measure is not empty (while it is)
   Rem: This error is not unlogical, because this change will impact the next measures which are not empty.

So alternate approach ("Attempt 2" in my demo)
3. Drop the current local time signature on the first non empty measure, in order to avoid that, when dropping a new local time signature on the empty measure, it impacts the next measures.
=> ERROR : the measure is not empty
Actually the measure is not empty, but as we are dropping the exact same times signature (in the demo, a 6/8 on a 6/8 measure), this should not give an error.

Supporting files, videos and screenshots

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

4.4.3

Regression

No.

Operating system

Windows 10

Additional context

Comes regularly on the forum:
E.g. https://musescore.org/en/node/292768

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 issue in MuseScore Studio 4.4.3 using the steps and the attached demonstration. Trace the validation performed when changing a local time signature on an empty measure with later content, including the case where the replacement signature is unchanged. Done means the valid signature change no longer reports that the measure is non-empty.