This commit contains two changes to how our site setting
keyword system works:
1. Crowdin, our translation provider, does not support YAML lists,
so we are changing site setting keywords in server.en.yml to
be pipe-separated (|)
2. It's unclear to translators what they are supposed to do with
aliases of site settings where the name has changed, e.g.
min_trust_level_for_here_mention. Instead of getting these as
keywords from the yml file, we can discern these from
SiteSettings::DeprecatedSettings automatically, and still use
them for client-side search
These changes should help improve the situation for translators.
d5b328b193