Settings, Companies, Companies, Bank Accounts does not have a duplicate button.

How would I create a push button that would duplicate a Bank Account like exists for Customers, Products, Projects, and so many other objects in OpenERP?

I've heard you "put a button on list view of o2m bank and call copy()!" Because "copy() does it all (default values + new values + translations)!" So this goes in my view.xml:

<record id="view_partner_bank_form_inherit_dale" model="ir.ui.view">
    <field name="name">Dale Bank Accounts - Journal</field>
    <field name="model">res.partner.bank</field>
    <field name="type">form</field>
    <field name="inherit_id" ref="base.view_partner_bank_form"/>
    <field name="arch" type="xml">
    <group name="bank" position="after">
    <group name="accounting" col="2" colspan="2" attrs="{'invisible': [('company_id','=', False)]}" groups="base.group_extended">
        <separator string="Duplicate" colspan="2"/>
        <button name="copy_bank" type="object" string="Duplicate"/>
    </group>
    </group>
    </field>
</record>

The button size is a bit large and I hear that "col, colspan; will adjust the size" then this goes in my bank.py:

class bank(osv.osv):
    _inherit = "res.partner.bank"

    def copy_bank(self, cr, uid, ids, context=None):
        for rec in self.browse(cr, uid, ids, context):
            self.copy(cr,uid, rec.id , {},context)
        return True
bank()

and everything works lovely.

I'd just like to move the Duplicate button up onto the same line with the Close button.