fix erro in Form

Form/Form.php

@@ -148,7 +148,7 @@ abstract class Form
     {
         $data['messages'] = $this->getMessages();
         $data['values'] = $this->getSourceValues();
-        \Majestic\Session::set(get_class($this), $data);
+        \Majestic\Session\Session::set(get_class($this), $data);
     }
 
     abstract protected function init();