R1:170dc15c05cb

Make border conditional in crumbs

Summary: Add a setBorder call to CrumbsView to be more deliberate when a border is drawn. Could not find any CSS hacks to set it conditionally CSS.

Test Plan: Browsed every application that called crumbs and make a design decision. Also fixed a few bad layouts.

Reviewers: btrahan, epriestley

Reviewed By: btrahan

Subscribers: Korvin, epriestley

Differential Revision: https://secure.phabricator.com/D11533