Fixed color for Case Details header text.

Signed-off-by: Jack Bransfield <jjbii@builtlight.org>
Navigation item colors are consistent with app state.

White before login.
After login, Negotiator green or Guardian orange.

Signed-off-by: Jack Bransfield <jjbii@builtlight.org>
Updated color of "+" icon based on Guardian/Negotiator mode.

Signed-off-by: Jack Bransfield <jjbii@builtlight.org>