Add a back to template link on job page

When you’ve sent message(s) using a template, often the next thing you
want to do is go and send the same template again, or edit it.

Currently there’s no way of getting to a template from a job except for
going back to the list of templates and re-finding it.

This commit adds a link at the bottom of the job page that gives you a
shortcut back to the individual template, where you can find actions
like edit/send/etc.

app/templates/partials/jobs/notifications.html

@@ -19,7 +19,7 @@
   {% else %}
 
     {% if notifications %}
-      <div class="dashboard-table">
+      <div class="dashboard-table bottom-gutter-3-2">
     {% endif %}
 
       {% if not help %}

app/templates/views/jobs/job.html

@@ -1,6 +1,7 @@
 {% extends "withnav_template.html" %}
 {% from "components/banner.html" import banner %}
 {% from "components/ajax-block.html" import ajax_block %}
+{% from "components/page-footer.html" import page_footer %}
 
 {% block service_page_title %}
   {{ uploaded_file_name }}
@@ -18,4 +19,11 @@
     {{ ajax_block(partials, updates_url, 'counts', finished=finished) }}
     {{ ajax_block(partials, updates_url, 'notifications', finished=finished) }}
 
+    {% if not help %}
+      {{ 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)
+      ) }}
+    {% endif %}
+
 {% endblock %}