Make CTA for submitting new news/events/etc. more clear.

Instead of a hyperlink, this appears as a button, so it is not
as hidden on the page.

templates/account/objectlist.html

@@ -30,7 +30,7 @@ additional moderation based upon what has changed in the content.
 <p>{{submit_header|safe}}</p>
 {%endif%}
 <p>
-<a href="/account/{{suburl}}/new/">Submit {{title}}</a>
+  <a class="btn btn-primary" href="/account/{{suburl}}/new/">Submit {{title}}</a>
 </p>
 
 {%endblock%}