stock-logistics-reporting/stock_picking_webkit/stock_view.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data noupdate="0">
        <record id="view_picking_out_form" model="ir.ui.view">
            <field name="name">stock.picking.out.form</field>
            <field name="model">stock.picking.out</field>
            <field name="inherit_id" ref="delivery.view_delivery_order_inherit_stock"/>
            <field name="arch" type="xml">
                <xpath expr="/form/header//button[@string='Print Delivery Order']" position="attributes">
                    <attribute name="name">%(stock.report_picking_list_out)d</attribute>
                </xpath>
            </field>
        </record>
    </data>
</openerp>