[Fix] Collection of minor Bugfixes (#417)

User feedback from on-prem installation

Co-authored-by: Tim Lorsbach <tim@lorsba.ch>
Reviewed-on: enviPath/enviPy#417

templates/collections/structures_paginated.html

@@ -3,7 +3,7 @@
 {% block page_title %}{{ page_title|default:"Structures" }}{% endblock %}
 
 {% block action_button %}
-  {% if meta.can_edit %}
+  {% if meta.can_edit or not meta.url_contains_package %}
     <button
       type="button"
       class="btn btn-primary btn-sm"