we just want the side effect of the update. #}
  {% set _ = page_config_full.update(baseUrl=base_url, wsUrl=ws_url) %}

  {# Sentinel value to say that we are on the tree page #}
  {% set _ = page_config_full.update(retroPage='consoles') %}

  <script id="jupyter-config-data" type="application/json">
    {{ page_config_full | tojson }}
  </script>
  <script src="{{page_config['fullStaticUrl'] | e}}/bundle.js" main="index"></script>

  <script type="text/javascript">
    /* Remove token from URL. */
    (fun