R1:f4943a37ee7e

Unselect "home" on mobile css

Summary: Ref T12174. Removed selected state CSS on mobile devices.

Test Plan: Set Chrome to responsive and check each break point.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Maniphest Tasks: T12174

Differential Revision: https://secure.phabricator.com/D17292