MAGETWO-60982: AJAX calls does not process error responses

Author: slopukhov

lib/web/mage/backend/bootstrap.js

@@ -14,13 +14,7 @@ define([
 ], function ($, mage) {
     'use strict';
 
-    var errorMessages = {
-        error: $.mage.__('HTTP Error'),
-        abort: $.mage.__('The request was aborted by the server'),
-        timeout: $.mage.__('The request timed out'),
-        parsererror: $.mage.__('XML/Json format is bad')
-    },
-        bootstrap;
+    var bootstrap;
 
     $.ajaxSetup({
         /*
@@ -84,7 +78,10 @@ define([
             $('body').notification('clear')
                 .notification('add', {
                     error: true,
-                    message: errorMessages[status] + ' (' + jqXHR.status + ' ' + jqXHR.statusText + ')',
+                    message: $.mage.__(
+                        'A technical problem with the server created an error. ' +
+                        'Try again to continue what you were doing. If the problem persists, try again later.'
+                    ),
 
                     /**
                      * @param {*} message