add reference from Volume to Issue and Comic

kontor-api/src/templates/comic/comic_detail.html

@@ -46,6 +46,28 @@
                 {% endfor %}
               </td>
           </tr>
+          {% if comic.volumes|length > 0 %}
+            <tr>
+              <th scope="row">Volumes</th>
+              <td colspan="2">
+                <ul>
+                  {% for volume in comic.volumes %}
+                    <li><a href="/comic/volumes/{{volume.id}}">{{volume.name}}</a></li>
+                  {% endfor %}
+                </ul>
+              </td>
+            </tr>
+          {% endif %}
+          <tr>
+            <th scope="row">Issues</th>
+            <td colspan="2">
+              <ul>
+                {% for issue in comic.sorted_issues() %}
+                  <li><a href="/comic/issues/{{issue.id}}">{{issue.issue_number}}</a></li>
+                {% endfor %}
+              </ul>
+            </td>
+          </tr>
           <tr>
             <th scope="row">Data Created</th>
             <td colspan="2">{{comic.created_date}}</td>
@@ -58,16 +80,6 @@
             <th scope="row">Data Version</th>
             <td colspan="2">{{comic.version}}</td>
           </tr>
-          <tr>
-            <th scope="row">Issues</th>
-            <td colspan="2">
-              <ul>
-                {% for issue in comic.sorted_issues() %}
-                  <li><a href="/comic/issues/{{issue.id}}">{{issue.issue_number}}</a></li>
-                {% endfor %}
-              </ul>
-            </td>
-          </tr>
         </tbody>
     </table>
   </div>