Backport #23733 by @wolfogre
I neglected that the `NameKey` of `Unit` is not only for translation,
but also configuration. So it should be `repo.actions` to maintain
consistency.
## ⚠️ BREAKING ⚠️
If users already use `actions.actions` in `DISABLED_REPO_UNITS` or
`DEFAULT_REPO_UNITS`, it will be treated as an invalid unit key.
Co-authored-by: Jason Song <i@wolfogre.com>
Follow #21962
After I eat my own dogfood, I would say that
ONLY_SHOW_RELEVANT_REPOS=false is necessary for many private/enterprise
instances, because many private repositories do not have
"description/topic", users just want to search by their names.
This PR also adds `PageIsExploreRepositories` check, to make code more
strict, because the `search` template is shared for different purpose.
And during the test, I found a bug that the "Search" button didn't
respect the "relevant" parameter, so this PR fixes the bug by the way
together.
Backport #23664 by @SuperSandro2000
Conflicts fixed by Andrew Thornton <art27@cantab.net>
Co-authored-by: Sandro <sandro.jaeckel@gmail.com>
Co-authored-by: Andrew Thornton <art27@cantab.net>
