dashboard: mark 'No result' text for translation

circle/dashboard/static/dashboard/dashboard.js

@@ -282,7 +282,7 @@ $(function () {
     for(i=0; i<5 && i<search_result.length; i++)
       html += generateGroupHTML(search_result[i].url, search_result[i].name, search_result.length < 5);
     if(search_result.length === 0)
-      html += '<div class="list-group-item list-group-item-last">No result</div>';
+      html += '<div class="list-group-item list-group-item-last">' + gettext("No result") + '</div>';
     $("#dashboard-group-list").html(html);
 
     // if there is only one result and ENTER is pressed redirect