Restore dashboard name prefixes

In lieu of '(mw)' and '(cdn)', 'MediaWiki: ' and 'Varnish: '.
This reverts commit c978cbb7d3ddb8e2df4bf9c887b96e50db76ee5b.

Change-Id: I8f4f1725eb36026bb2c5f142de97b1df558a6f01