title: Shopware : Impossible to extend through plugin user-detail
body: <p>I have Shopware 6.5.3. I was trying to extend &quot;sw-users-permissions-user-detail&quot; like this :</p>
  <pre><code>import template from './sw-users-permissions-user-detail.html.twig';
  
  Shopware.Component.override('sw-users-permissions-user-detail', {
      template
  });
  </code></pre>
  <p>And file 'sw-users-permissions-user-detail.html.twig'</p>
  <pre><code>{% block sw_settings_user_detail %}
      {% parent %}
      {% block test %}
          &lt;p&gt;Blabla&lt;/p&gt;
      {% endblock %}
  {% endblock %}
  </code></pre>
  <p>It's not working at all, and I don't know why.
  Any help ?</p>
  <p><em>NB : It's working when I'm overriding other templates :</em></p>
  <pre><code>Component.override('sw-dashboard-index', {
      template
  });
  </code></pre>