Revert "Revert "Reenable WikiGrok UI on enwiki""

This reverts commit 3be05ce4578b454ecf0f8b7615b796e9c48d4dc8.

Change-Id: I006e02d542738de2dcd8e305cb51f3c38fcc9708
Merge "Revert "Revert "Reenable WikiGrok UI on enwiki"""