Redesign Crumbs

Summary: Slimmer crumbs, less complex, no sprites, less visual disruption.

Test Plan:
Test Conpherence, Objects, Application Search pages.

{F275026}

{F275027}

Reviewers: btrahan, epriestley

Reviewed By: epriestley

Subscribers: Korvin, epriestley

Differential Revision: https://secure.phabricator.com/D11486