Board Thread:Support Requests - Getting Technical/@comment-25463843-20150830131309/@comment-1757994-20150830203637

That meant admin access to each wiki's Common.js, Wikia.js, and Monobook.js in the MediaWiki: namespace.

User blog:DaNASCAT/Technical Update: August 26, 2015 says:


 * The team is also very hard at work at getting JS page editing available again. We'll have more news to share on this soon!

They're still working on subpages in the MediaWiki: namespace and any personal js.