Make "Header orientation" a per entity setting

Re-rolled patch from #19.

I tested the patch in #21 and it works well. Thanks!

The only thing that probably needs to be fixed is that we still have the checkboxes in field formatter settings. Since they are ignored because the actual settings stored on the entity are used, we should probably get rid of them.

See comment #23:

We still have the checkboxes in field formatter settings but these are now ignored.

I applied suggestion from #23 over patch from #21

Please use an issue fork and merge request.

Patch no longer applies cleanly.

This is working fine on a clean install, but when applied to an existing Drupal 11 site, the `Use header` option still appears.

Investigating.

MR is ready for review.

There is one coding standards issue to fix.

Odd, I would have expected the MR to not have a green check in that case.

Anyway, fixed.

Coding standards issues do not prevent tests from being counted as passed.

Yeah,. I thought we could set that to strict. I suppose we can only skip them.

It can be configured so that coding standards issues create failures instead of warnings and then the overall will report a failure.

All that aside, this seems to be working as expected.