R1:aef8e49ec6e1

Crumbs on mobile should also sit flush

Summary: Increase the CSS specificity on mobile so correct styles are applied.

Test Plan: Test a Maniphest Task

Reviewers: btrahan, epriestley

Reviewed By: epriestley

Subscribers: Korvin, epriestley

Differential Revision: https://secure.phabricator.com/D11618