页签中加按钮 odoo里面

<notebook>
    <page string="订">
        <field name="line_id" >
            <tree string="订单明细" editable="false">
                <field name="partner_id" invisible="1"/>
                <field name="product_id"  on_change="get_product_unit(product_id,parent.cust_order_no,parent.date_planned,parent.partner_id)"/>
                <field name="pname"/>
                <field name="spec"/>
                <field name="product_qty" on_change="qty_price_change(product_qty,price)"/>
                <field name="dlvqty"/>
                <field name="price" />
                <field name="total"/>
                <field name="product_uom"/>
                <field name="packing_type1"/>
                <field name="date_planned"/>
                <field name="requirement_id" on_change="sale_requirements_change(requirement_id)"/>
                <field name="memo"/>
                <field name="choice" />
                <field name="state"/>
            </tree>
        </field>
        <group class="oe_subtotal_footer oe_right" colspan="2" name="sale_total">
            <field name="countsqty" widget='monetary' />
            <field name="subtotal" widget='monetary' />
            <button name="action_confirm_all_sale_order" string="确认" type="action" />
        </group>
        <div class="oe_clear"/>
    </page>