Board Thread:Support Requests - Community Management/@comment-26510509-20150822231759/@comment-168424-20151008164556

I'm surprised no one on this thread has looked around at other forum posts...

Anyway, you can see the list of editable MediaWiki: pages here: Help:System messages/whitelist.

If you want a page unlocked, request it here: MediaWiki pages that should be whitelisted, but aren't.

I hope that helps.

BTW, MediaWiki:Sidebar is for the Monobook skin which is technically unsupported.