account-financial-reporting/bank_statement_reconciliation_summary/view/account_bank_statement.xml

<?xml version="1.0" encoding="UTF-8"?>
<openerp>
    <data>

            <record id="unreconcile_bank_statement_form_view" model="ir.ui.view">
            <field name="name">account.bank.statement.form.view</field>
            <field name="model">account.bank.statement</field>
            <field name="inherit_id" ref="account.view_bank_statement_form"/>
            <field name="arch" type="xml">
                <button string="Import Invoice" position="before">
                    <button type="action"
                        class="oe_inline oe_stat_button"
                        id="wiz_unreconcile"
                        icon="fa-pencil-square-o"
                        name="%(bank_statement_reconcile_action)d"
                        attrs="{'invisible': [('state', '!=', 'draft')]}"
                        style="width: 180px !important;">
                        <div>Import<br/>Payments and Receipts</div>
                    </button>
                    <button type="object"
                        class="oe_inline oe_stat_button"
                        id="wiz_unreconcile"
                        icon="fa-strikethrough"
                        name="delete_unreconciled"
                        attrs="{'invisible': [('state', '=', 'confirm')]}"
                        style="width: 180px !important;">
                        <div>Remove Unreconciled</div>
                    </button>
                </button>
            </field>
        </record>

    </data>
</openerp>