Split subgroup links in comments page header

tildes/tildes/templates/topic.jinja2

@@ -26,7 +26,11 @@
 {% endblock %}
 
 {% block header_context_link %}
-<a class="site-header-context" href="/~{{ topic.group.path }}">~{{ topic.group.path }}</a>
+  {# Split the link out for each "segment" of the group path #}
+  <a class="site-header-context" href="/~{{ topic.group.path[0:1] }}">~{{ topic.group.path[0:1] }}</a>
+  {% for i in range(1, topic.group.path|length) %}
+    .<a class="site-header-context" href="/~{{ topic.group.path[0:i+1] }}">{{ topic.group.path[i:i+1] }}</a>
+  {% endfor %}
 {% endblock %}
 
 {% block content %}