title: ExtJS FormPanel change element names
body: <p>I have a FormPanel with a tree of checkboxes wich are added on creation. Now i want to change the general name pattern of all checkboxes inside the panel. According to the DOM the names are changed correctly but when i submit the form still the old names are submitted. Tried calling .doLayout but without any luck. Any ideas?</p>
  
  <pre><code>changePredicateName: function (panel, predicateName) {
      var ref = this;
      this.counter = 0;
      panel.cascade(function (o) {
          var name = ref.groupId + "." + predicateName + "." + ref.counter + "_value";
          if (o instanceofnExt.form.Checkbox) {
              o.name = name;
              ref.counter++;
          } else if (o.titleCheckbox) {
              o.titleCheckbox.name = name;
              ref.counter++;
          }
          return true;
      });
      panel.doLayout();
  },
  </code></pre>