R1:b53a9f0e1206

Fix Conpherence mobile layout

Summary: Fixes the spacing around "Send Message", which changed from "Pontificate"

Test Plan: Use Chrome explorer and iOS simulator to test new CSS

Reviewers: btrahan, epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D8866