show edit button only for superuser

app/server/templates/annotation/annotation_base.html

@@ -6,12 +6,14 @@
 <script src="https://unpkg.com/lodash@4.16.0"></script>
 {% endblock %}
 {% block navigation %}
+{% if user.is_superuser %}
 <a class="navbar-item" href="{% url 'dataset' view.kwargs.project_id %}">
   <span class="icon">
     <i class="fas fa-edit"></i>
   </span>
   <b>Edit Data</b>
 </a>
+{% endif %}
 {% endblock %}
 {% block content %}
 <div class="columns" id="mail-app" v-cloak>