refer directly to listing title (a required field) rather than to its isbn

bookshare/core/templates/bids_row.html

@@ -5,7 +5,7 @@
 <tr>
 {% endif %}
   <td class="text-center col-md-2"><h4>{{ bid.created|date:"m/d/y" }}</h4></td>
-  <td class="text-center col-md-7"><h4><a href="{{ bid.listing.get_absolute_url }}">{{ bid.listing.isbn|isbn_name|title }}<a/></h4></td>
+  <td class="text-center col-md-7"><h4><a href="{{ bid.listing.get_absolute_url }}">{{ bid.listing.title }}<a/></h4></td>
   <td class="text-center col-md-1"><h4>
     {% if bid.listing.exchanged %}
       <span class="label label-primary"><strong>Exchanged</strong></span>