@Override
  public void uninstallUI(JComponent c) {
    ToolbarComboWidget widget = (ToolbarComboWidget)c;
    widget.removePropertyChangeListener(this);
    tryUpdateHtmlRenderer(widget, "");
    hoverTracker.uninstall();
    clickListener.uninstall(widget);
  }
@Override
  public void uninstallUI(JComponent c)