Allow piwikApi users to specify if they want an error notification to be created on error or not.

plugins/CoreHome/angularjs/common/services/piwik-api.js

@@ -44,7 +44,9 @@
         }
 
         function createResponseErrorNotification(response, options) {
-            if (response.message) {
+            if (response.message
+                && options.createErrorNotification
+            ) {
                 var UI = require('piwik/UI');
                 var notification = new UI.Notification();
                 notification.show(response.message, {
@@ -66,6 +68,10 @@
                 options = {};
             }
 
+            if (options.createErrorNotification === undefined) {
+                options.createErrorNotification = true;
+            }
+
             var deferred = $q.defer(),
                 requestPromise = deferred.promise;
 
@@ -271,7 +277,7 @@
              * @deprecated
              */
             abort: abort,
-            abortAll: abortAll,
+            abortAll: abortAll
         };
     }
 })();
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