Board Thread:Support Requests - Getting Technical/@comment-30025454-20161018235439/@comment-26437440-20161019000425

There's a MediaWiki page that'll let you edit the sidebar, it's MediaWiki:Sidebar. Changing "content-url|content" to "Special:AllPages|content" on that page will make the Content link take you to all the pages again.

It'll require admin permission to edit, but there's no other way to change the bar though as far as I know.