[1.6.1.X] Override AdminOrders filter Shipped orders

[Casper_O]

With 50 orders aday, it can be a little messy when sometimes products is not in stock, so we did not show shipped and cancelled orders by default.

 

What we have tried so far is to make an override of AdminOrdersController with the following info:

public function renderList(){
    if(!$this->_filter)
    {
        $this->_filter = "AND os.`id_order_state` NOT IN(4,6) ";
	return parent::renderList();
    }
}

Problem is, as soon we search for something this filter seems to still apply (even that it should not due to the if statemenet)