Default Tickets Sort

Refactor PR #3410 to drop extra commits.
All credit to @jdelhome3578

include/client/tickets.inc.php

@@ -47,8 +47,10 @@ if($sort && $sortOptions[$sort])
     $order_by =$sortOptions[$sort];
 
 $order_by=$order_by ?: $sortOptions['date'];
-if($_REQUEST['order'] && $orderWays[strtoupper($_REQUEST['order'])])
-    $order=$orderWays[strtoupper($_REQUEST['order'])];
+if ($_REQUEST['order'] && $orderWays[strtoupper($_REQUEST['order'])])
+    $order = $orderWays[strtoupper($_REQUEST['order'])];
+else
+    $order = $orderWays['DESC'];
 
 $x=$sort.'_sort';
 $$x=' class="'.strtolower($_REQUEST['order'] ?: 'desc').'" ';