Print label functions return printer error as flash message not system error; update progrnostic_indicator.t after recent icdo_sub_category table change
adaptations for request form access by non-logged-in user * generate 'centre' token in login() for use in request-form url * adapt create_form_tokens() to accept 'centre' only * Local::Utils encrypt & decrypt functions capture Crypt::CBC errors & return empty not stacktrace
