Deploy the settings feature branch everywhere
= Pre-checklist
[] Ensure https://gerrit.wikimedia.org/r/403841 got merged (otherwise stable features will be listed in beta)
[x] Check QA has occurred on staging
@phuedx: {T184742} is a direct subtask (blocker).
= Acceptance criteria
[] Merge `specialpages` branch in Minerva to master.
[] Merge `specialpages` branch in MobileFrontend to master.
[] Un-deploying is simple (revert a single commit instead of multiple).
[] Merge as early in the week as possible so translators can make updates before it goes to prod.
[] Set $wgMFBetaFeedbackLink to the feedback page
= Testing criteria
[] This will deploy the new settings page to the beta cluster which will roll out to production on the next train.
= Post deploy/sign off
[] Update https://www.mediawiki.org/wiki/Reading/Web/Release_timeline
[] Update on mailing lists
[] Update [the MobileFrontend documentation](https://www.mediawiki.org/wiki/Extension:MobileFrontend) to reflect that it requires the latest version of MediaWiki
= Open questions
[] What should MFBetaFeedbackLink point to?