sync with date

app/assets/javascripts/app/frontend/models/api/item.js

@@ -47,7 +47,6 @@ class Item {
 
   alternateUUID() {
       this.uuid = Neeto.crypto.generateUUID();
-      console.log("Generating new UUID", this.uuid);
   }
 
   setDirty(dirty) {
@@ -108,12 +107,12 @@ class Item {
 
   allReferencedObjects() {
     // must override
-    return null;
+    return [];
   }
 
   referencesAffectedBySharingChange() {
     // should be overriden to determine which references should be decrypted/encrypted
-    return null;
+    return [];
   }
 
   isPublic() {

app/assets/javascripts/app/services/apiController.js

@@ -281,7 +281,7 @@ angular.module('app.frontend')
           return;
         }
 
-        console.log("handle unsaved", unsaved);
+        console.log("Handle unsaved", unsaved);
         for(var mapping of unsaved) {
           var itemResponse = mapping.item;
           var item = modelManager.findItem(itemResponse.uuid);
@@ -295,7 +295,7 @@ angular.module('app.frontend')
           }
         }
 
-        this.sync(null);
+        this.syncWithOptions(null, {additionalFields: ["created_at", "updated_at"]});
       }
 
       this.handleItemsResponse = function(responseItems, omitFields) {