#3417 also send id of parameter with api response

src/Umbraco.Web/Editors/MacrosController.cs

@@ -100,7 +100,8 @@
                                    {
                                        Editor = param.EditorAlias,
                                        Key = param.Alias,
-                                       Label = param.Name
+                                       Label = param.Name,
+                                       Id = param.Id
                                    });
             }
 

src/Umbraco.Web/Models/ContentEditing/MacroParameterDisplay.cs

@@ -25,5 +25,11 @@
         /// </summary>
         [DataMember(Name = "editor")]
         public string Editor { get; set; }
+
+        /// <summary>
+        /// Gets or sets the id.
+        /// </summary>
+        [DataMember(Name = "id")]
+        public int Id { get; set; }
     }
 }