- Aligns with the naming convention set from Wagtail 4.2
- Add deprecation warnings if classnames is accessed & unit tests for this
- Update other unit tests to use the naming
Since Wagtail 4.1 the Settings Tab and the corresponding scheduling of pages has been moved to the Status side panels. As mentioned in the release notes of Wagtail 4.1: [See here](https://docs.wagtail.org/en/stable/releases/4.1.html#new-ui-for-scheduled-publishing).
In the documentation section for customising the edit interface, this snippet is still available. When implemented, there is no effect and no error is shown.
Therefore this line is obsolete and only the two tabs 'Content' and 'Promote' should be available.
Co-authored-by: Julian Bigler <disperate@users.noreply.github.com>
