Right-aligned status text in backends

[oscargus]

PR Summary

Closes #22012

Not clear how to add a test for it.

Also, should this be documented with a "what's new"? Seems quite marginal...

(I couldn't figure out how the macosx-version worked, and do not have a mac to test it...)

PR Checklist

Tests and Styling

• Has pytest style unit tests (and pytest passes).
• Is Flake 8 compliant (install flake8-docstrings and run flake8 --docstring-convention=all).

Documentation

• New features are documented, with examples if plot related.
• New features have an entry in doc/users/next_whats_new/ (follow instructions in README.rst there).
• API changes documented in doc/api/next_api_changes/ (follow instructions in README.rst there).
• Documentation is sphinx and numpydoc compliant (the docs should build without error).

[anntzer]

lgtm.
I don't think this is particularly testable (other than manually).