Fixed "TypeError: table.tBodies[0] is undefined" host browser JS error

Traced in browser console when a host details table is empty.

htroot/HostBrowser.html

@@ -196,6 +196,7 @@ var solr= $.getJSON("solr/collection1/select?q=*:*&defType=edismax&start=0&rows=
         	<th style="text-align:right; padding:2px;" class="listingem">failed</th>
       	</tr>
       </thead>
+      <tbody>
       #(root)#
       <tr class="TableCell#(dark)#Light::Dark::Summary#(/dark)#">
         <td style="text-align:center"></td>
@@ -226,6 +227,7 @@ var solr= $.getJSON("solr/collection1/select?q=*:*&defType=edismax&start=0&rows=
         </tr>
         #(/type)#
       #{/list}#
+      </tbody>
       </table>
     </fieldset>