Fix Android/Chrome issues in Crumbs/Timeline

Summary: Android/Chrome seems to run Blink and not WebKit. Unclear if these bugs are temporary or "correct". Fixing in any case, can investigate if more come in.

Test Plan: Used Chrome Developer tether to a Nexus 7, fixed CSS by hand.

Reviewers: epriestley, btrahan

Reviewed By: btrahan

Subscribers: epriestley, Korvin

Maniphest Tasks: T4907

Differential Revision: https://secure.phabricator.com/D8874