paypro: fix tx broadcasting with domains as paypro addresses.

js/controllers/send.js

@@ -178,6 +178,15 @@ angular.module('copayApp.controllers').controller('SendController',
         };
       }
 
+      // If we're setting the domain, ignore the change.
+      if ($rootScope.merchant
+          && $rootScope.merchant.domain
+          && address === $rootScope.merchant.domain) {
+        uri = {
+          merchant: $rootScope.merchant.request_url
+        };
+      }
+
       if (uri && uri.merchant) {
         w.createPaymentTx({
           uri: uri.merchant,