How can I add a button to the right-hand column within a form view? For example, I am extending the sale order form view with the following fields:

<xpath expr="//div[@name='carrier_selection']" position="after">

            <field name="x_shipping_method_id" options="{'no_create': True, 'no_open': True}"/>

            <field name="x_shipping_cost"/>

            <field name="x_staff_notes" attrs="{'invisible': [('x_staff_notes', '=', False)]}"/>

            <field name="x_custom_products" attrs="{'invisible': [('x_custom_products', '=', False)]}"/>

            <field name="x_is_custom_products_acknowledged" invisible="1"/>

            <button name="434" type="action" string="Acknowledge Custom Products" class="oe_highlight" attrs="{'invisible': ['|',('x_custom_products', '=', False),'&amp;',('x_custom_products', '!=', False), ('x_is_custom_products_acknowledged', '=', True)]}"/>

          </xpath>

This results in the new fields being added in a grid with the labels on the right, and the values on the left. I want the button element to be added to the right-hand column of this grid. Currently it gets placed beneath the labels, in the left-hand column, but I would like it underneath the values, in the right-hand column. Is this possible with Odoo?