Adds status colors to navbar tabs

Summary: Adds the abilit to set a status color of warning or fail to navbar tab lists (for objectheaders)

Test Plan: uiexamples, photoshop

Reviewers: epriestley

Reviewed By: epriestley

CC: Korvin, epriestley, aran

Differential Revision: https://secure.phabricator.com/D7266