Hide footer on mobile app switcher
Summary: Fixes T7609. When we moved the sidenav background to z-index -1, the footer then reappeared. Make the hiding more specific in CSS.
Test Plan: test mobile layout of homepage, check footer still exists on all other pages.
Reviewers: btrahan, epriestley
Reviewed By: epriestley
Subscribers: Korvin, epriestley
Maniphest Tasks: T7609
Differential Revision: https://secure.phabricator.com/D12138