menu.xml

<?xml version="1.0"?>
<!--
    Copyright (C) 2016-Today: La Louve (<http://www.lalouve.net/>)
    @author: La Louve
    License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
-->
<odoo>
    <menuitem id="menu_invoice_refund"
        name="Vendor Refunds"
        parent="purchase.menu_purchase_control"
        sequence="15"
        action="action_invoice_refund"/>
</odoo>