Add some icons/color to Config Settings UI

Summary: This adds status icons, locked, hidden, editable, customized, to the list of options in config. Makes it easier to read and assertain state.

Test Plan:
View a hidden, customized, editable, and locked.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D16475