Revert "Fixes ispconfig/ispconfig3#3943"

A. Täffner

2016-06-14 b8942a6e3ac3786d82d4ab5f1c340028c29e9d62

 interface/lib/classes/listform_actions.inc.php

@@ -190,6 +190,7 @@
      return $rec;
   }

   /* TODO: maybe rewrite SQL */
   public function getQueryString($no_limit = false) {
      global $app;
      $sql_where = '';