R1:27c2299407f3

Remove double border on tables in object boxes

Summary: The CSS rule tends to miss many tables, make the rule more universal and add borders as needed.

Test Plan: Test a Revision and Diffusion

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D9516