banish isbn 10 display because it might not exist and prefer not to address the issue

frontend/templates/campaign_detail.html

@@ -27,7 +27,7 @@
     <p>Target: {{campaign.target}}</p>
     <p>Deadline: {{campaign.deadline}}</p>
     <p>Status: {{campaign.status}}</p>
-    <p>ISBN: {{campaign.work.editions.all.0.isbn_10}} | {{campaign.work.first_isbn_13}} </p>
+    <p>ISBN: {{campaign.work.first_isbn_13}} </p>
     <p><a href="{% url widget isbn=campaign.work.first_isbn_13 %}">Widget Link</a></p>
     <p>Embed a widget:</p>
     <textarea rows="2" cols="80">&lt;iframe src="{{base_url}}/api/widget/{{campaign.work.first_isbn_13}}/" width="152" height="325" frameborder="0"&gt;</iframe></textarea>