Integrates the changes of forgejo/forgejo#11848.
This would also deserve new screenshots, I'm considering how best to refresh them (see discussion in the PR).
This probably shouldn't be merged before Codeberg updates to Forgejo 15, since users will still be confronted to the old UI in the meantime.
Reviewed-on: https://codeberg.org/Codeberg/Documentation/pulls/772
Reviewed-by: Otto <otto@codeberg.org>
Reviewed-by: Robert Wolff <mahlzahn@posteo.de>