Link to the relevant job from notification page

If a notification has been sent from a job then that’s important context
to know about it. So we should surface that information on the page.

It also gives users an easy way of going back, if that’s the page
they’ve come from.

app/templates/views/notifications/notification.html

@@ -15,7 +15,14 @@
     </h1>
 
     <p>
-      Sent {% if created_by %}by {{ created_by.name }} {% endif %}
+      <a href="{{ url_for('.view_template', service_id=current_service.id, template_id=template.id) }}">{{ template.name }}</a>
+      sent
+      {% if job %}
+        from
+        <a href="{{ url_for('.view_job', service_id=current_service.id, job_id=job.id) }}">{{ job.original_file_name }}</a>
+      {% elif created_by %}
+        by {{ created_by.name }}
+      {% endif %}
       on {{ created_at|format_datetime_short }}
     </p>
 
@@ -23,9 +30,4 @@
 
     {{ ajax_block(partials, updates_url, 'status', finished=finished) }}
 
-    {{ page_footer(
-      secondary_link=url_for('.view_template', service_id=current_service.id, template_id=template.id),
-      secondary_link_text='Back to {}'.format(template.name)
-    ) }}
-
 {% endblock %}