fix cooperative template extension (#8)

use super to call to other extension instead of overwriting the whole block

ckanext/generalpublic/templates/package/snippets/resource_item.html

@@ -2,38 +2,7 @@
 
 {% block resource_item_explore_links %}
 {%if h.is_public(pkg.id) or c.userobj%}
-  <li>
-    <a href="{{ url }}">
-      {% if not is_activity_archive and res.has_views %}
-        <i class="fa fa-bar-chart-o"></i>
-        {{ _('Preview') }}
-      {% else %}
-        <i class="fa fa-info-circle"></i>
-        {{ _('More information') }}
-      {% endif %}
-    </a>
-  </li>
-  {% if res.url and h.is_url(res.url) %}
-  <li>
-    <a href="{{ res.url }}" class="resource-url-analytics" target="_blank">
-      {% if res.has_views or res.url_type == 'upload' %}
-        <i class="fa fa-arrow-circle-o-down"></i>
-        {{ _('Download') }}
-      {% else %}
-        <i class="fa fa-external-link"></i>
-        {{ _('Go to resource') }}
-      {% endif %}
-    </a>
-  </li>
-  {% endif %}
-  {% if can_edit %}
-  <li>
-    <a href="{{ h.url_for(pkg.type ~ '_resource.edit', id=pkg.name, resource_id=res.id) }}">
-      <i class="fa fa-pencil-square-o"></i>
-      {{ _('Edit') }}
-    </a>
-  </li>
-  {% endif %}
+  {{ super() }}
 {% else %}
   <li>
     <a href="https://mdep.smdh.uk/user/saml2login">
@@ -42,4 +11,4 @@
     </a>
   </li>
 {% endif %}
-{% endblock %}
+{% endblock %}