GitLab

* Start improving English grammar and consistency.

* Apply review comments, push translation further.

* Additional review changes; expand translation.

* Undo team/organization change, further translation.

* Add site administration; review comments; merge.

* Update hardcoded branch protection string tests.

* Update hardcoded branch deletion string test.

* Update another hardcoded translation string test.

* Add my nickname to the list of translators.

* Implement @lafriks review comments.

* Remove (now) unused branch deletion warnings.

* Remove (now) unused branch deletion warnings.