bank-payment/account_banking_payment_transfer/view/account_payment.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data>
        <record id="view_payment_order_form_inherit" model="ir.ui.view">
            <field name="name">account.payment.order.form (account_banking_payment_transfer)</field>
            <field name="model">payment.order</field>
            <field name="inherit_id" ref="account_payment.view_payment_order_form" />
            <field name="arch" type="xml">
                <xpath expr="//button[@name='%(account_payment.action_create_payment_order)d']" position="after">
                    <button class="oe_inline oe_stat_button"
                    name="partial" type="object"
                    attrs="{'invisible':[('partial_reconcile_count','=',0)]}"
                    icon="fa-check-square-o">
                    <field name="partial_reconcile_count" widget="statinfo"/>
                    </button>
                </xpath>
            </field>
        </record>
    </data>
</openerp>