[Surrey] Continue button should not be visible when disabled

Reported that users think the button is broken and don't read
the message above for an explanation of why they can't proceed

https://mysocietysupport.freshdesk.com/a/tickets/4768

.cypress/cypress/integration/surrey.js

@@ -15,11 +15,13 @@ describe('Reporting not on a road', function() {
         cy.pickCategory('Abandoned vehicles');
         cy.contains('You cannot send Surrey County Council a report');
         cy.get('#map_sidebar').scrollTo('bottom');
-        cy.get('.js-reporting-page--next:visible').should('be.disabled');
+        cy.get('.js-reporting-page--next').should('be.disabled');
+        cy.get('.js-reporting-page--next').should('not.be.visible');
         cy.pickCategory('Flooding inside a building');
         cy.contains('You cannot send Surrey County Council a report').should('not.be.visible');
         cy.get('#map_sidebar').scrollTo('bottom');
         cy.get('.js-reporting-page--next:visible').should('not.be.disabled');
+        cy.get('.js-reporting-page--next').should('be.visible');
     });
 });
 

web/cobrands/fixmystreet/assets.js

@@ -1556,7 +1556,7 @@ fixmystreet.message_controller = (function() {
     }
 
     function hide_continue_button() {
-        var cobrands_to_hide = ['hart'];
+        var cobrands_to_hide = ['hart', 'surrey'];
         if (cobrands_to_hide.indexOf(fixmystreet.cobrand) !== -1) {
             return 1;
         }