xmlui: Modify header link in ILRI-new theme

Signed-off-by: Alan Orth <alan.orth@gmail.com>
xmlui: Only display profile information in header if authenticated

Bringing functionality / layout of old ILRI theme into ILRI-new.

Signed-off-by: Alan Orth <alan.orth@gmail.com>
xmlui: Hardcode Google Analytics UA in ILRI-new

Signed-off-by: Alan Orth <alan.orth@gmail.com>