If an error response is provided it will display for save button errors:

Refer to: http://manage.dimagi.com/default.asp?143356#798392
@dannyroberts There are a number of places where this code appears to be duplicated, do I need to update it in all of them? e.g. staticfiles/hqwebapp/js vs. corehq /apps/hqwebapp/staticfiles/hqwebapp/js