System locks don't include a leading/trailing horizontal frame

Issue type

Engraving bug (incorrect score rendering)

Description with steps to reproduce

1. Have a score where a coda starts on a new system and with a leading horizontal frame (for indenting).
2. That coda is a tad too long to fix the system, so overflows into the next system.
3. Try to apply a system lock to (a rrand selection of) the meausures to force them into one system.

Note that you cannot include the horizontal frame into the range selection.
You can only range select the measures.
Once the system lock is applied, the horizontal frame shows all alone and above that system as an "empty system"

Supporting files, videos and screenshots

n/a

In which versions of MuseScore Studio is this issue present?

4.6.5

Regression

No.

Operating system

Windows 11, but that hardly matters

Additional context

n/a

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