Added more documentation. Added new refresh mechanism to lists.

ignite-html.js

@@ -456,7 +456,12 @@ class IgniteObject {
  * @ignore
  */
 class IgniteCallback {
-    constructor(callback, detach) {
+    /**
+     * Creates a new IgniteCallback with a callback and optional detach callback.
+     * @param {Function(...)} callback The callback function to invoke when the callback is invoked.
+     * @param {Function(IgniteCallback)} detach The detach function that is called when the callback is disconnected.
+     */
+    constructor(callback, detach = null) {
         this.callback = callback;
         this.detach = detach;
     }