title: Amp-sidebar does not close
body: <p>When the sidebar contains a nested menu, the close event does not work</p>
  
  <pre><code>&lt;button on="tap:sidebar.open"&gt;Open&lt;/button&gt;
  &lt;div className="sidebar-menu"&gt;
    &lt;amp-sidebar id="sidebar" layout="nodisplay" class="sidebar-menu__sidebar" side="left"&gt;
      &lt;div role="button" aria-label="close sidebar" on="tap:sidebar.toggle" tabindex="0" class="close-sidebar"&gt;✕&lt;/div&gt;
  
      &lt;amp-nested-menu layout="fill"&gt;
        &lt;ul className="sidebar-menu__main-menu"&gt;
          &lt;li key="item" on="tap:sidebar.close"&gt;item&lt;/li&gt;
        &lt;/ul&gt;
      &lt;/amp-nested-menu&gt;
    &lt;/amp-sidebar&gt;
  &lt;/div&gt;
  </code></pre>