[Redesign] Misc Buggypoos

Summary:

• Give preference to Segoe on Windows
• Move to Lato headers except documents
• Fix diviner issues
• Fix feed overwriting line-height
• Fix apps launcher
• Fix infoview + listview
• Make tall headers less tall
• Legalpad, Diviner tweaks

Test Plan: Random surfing. @epriestley can you just commit this for me, connection generally shitty.

Reviewers: btrahan, epriestley

Reviewed By: epriestley

Subscribers: Korvin, epriestley

Differential Revision: https://secure.phabricator.com/D13305