Add comments and sharing to all content pages

Listing pages already have this block overwritten for pagination
controls

website/blog/templates/blog/blog_post_page.html

@@ -1,6 +1 @@
 {% extends "common/content_page.html" %}
-
-{% block post_content %}
-  {% include "common/shareon.html" %}
-  {% include "common/comments.html" %}
-{% endblock %}

website/common/templates/common/content_page.html

@@ -10,6 +10,11 @@
   {% endif %}
 {% endblock %}
 
+{% block post_content %}
+  {% include "common/shareon.html" %}
+  {% include "common/comments.html" %}
+{% endblock %}
+
 {% block extra_css %}
   {% sri_static "css/lite-youtube-embed.css" %}
   {% sri_static "contrib/shareon/shareon.min.css" %}

website/spotify/templates/spotify/spotify_playlist_page.html

@@ -25,5 +25,5 @@
     </table>
   </section>
 
-  {% include "common/shareon.html" %}
+  {{ block.super }}
 {% endblock %}