Allow sort by translated string

Author: MartinFournier

msgfmt:ui/lib/ui.html

@@ -77,7 +77,7 @@ <h2>{{mf 'mf_site_translations' 'Site Translations'}}</h2>
               <th><a href="#" class="translationSort" data-sortField="key">Key</a></th>
             {{/if}}
             <th><a href="#" class="translationSort" data-sortField="orig">Original String ({{origLang}})</a></th>
-            <th>Translation ({{destLang}})</th>
+            <th><a href="#" class="translationSort" data-sortField="trans">Translation ({{destLang}})</a></th>
           </tr>
         </thead>
       </table>