Staff text line, System text line, and Change instrument palette items should translate

Issue type

UI bug (incorrect info or interface appearance)

Description with steps to reproduce

There is a weird inconsistency in naming between the "Stave text" and "Staff" text palette items.

Their hover text is "Stave text" and "Stave text line" respectively.

Supporting files, videos and screenshots

In which versions of MuseScore Studio is this issue present?

OS: macOS Sequoia (15.7.7), Arch.: arm64, MuseScore Studio version (64-bit): 4.7.4-260706075, revision: github-musescore-musescore-7688c00

Regression

I was unable to check

Operating system

macOS

Additional context

My region settings:

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

No source files, tests, or entry points are named in the issue. Start by locating the palette item labels and their translation entries, then verify the Staff text line, System text line, and Change instrument labels use translatable, consistent wording in the UI.