Surface talk page on desktop version of skin

Make Minerva 50% closer to being Martijn Hoekstra's favourite
desktop skin.

Remains hidden on mobile stable site.
See: http://lists.wikimedia.org/pipermail/wikitech-l/2014-March/075150.html

Change-Id: Ica0a8671d6b78e31e30b1a1a85f571beebd81030
Merge "Surface talk page on desktop version of skin"