Make delete link flush left when there’s no button

The delete link was designed to be used with a button, where it needs
some padding to separate it from the button.

We now have a case where it’s being used without an accompanying button,
so we need a variation without that padding.

app/templates/components/page-footer.html

@@ -17,7 +17,7 @@
       <a class="page-footer-back-link" href="{{ back_link }}">{{ back_link_text }}</a>
     {% endif %}
     {% if delete_link %}
-      <span class="page-footer-delete-link">
+      <span class="page-footer-delete-link {% if not button_text %}page-footer-delete-link-without-button{% endif %}">
         <a href="{{ delete_link }}">{{ delete_link_text }}</a>
       </span>
     {% endif %}