Always show headline level

[tvdeyen]

What is this pull request for?

But disable it if only one option is available. Gives the author some visual feedback on the headline level.

Checklist

• [x] I have followed Pull Request guidelines
• [x] I have added a detailed description into each commit message
• [x] I have added tests to cover this change

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 95.92%. Comparing base (e2f9520) to head (a6e6675).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2825 +/- ## ======================================= Coverage 95.92% 95.92% ======================================= Files 225 225 Lines 6128 6128 ======================================= Hits 5878 5878 Misses 250 250 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.