ARGOMENTO: Form da one2many

<notebook>
                        <page string="Certificati">
                            <field name="certificate_ids">
                                <tree colors="green:state == 'valid';red:state == 'expired';brown:state == 'to_expired'">
                                    <field name="name"/>
                                    <field name="emission_date"/>
                                    <field name="expire_date"/>
                                    <field name="number"/>
                                    <field name="issuer_partner_id"/>
                                    <field name="note"/>
                                    <field name="state"/>
                                </tree>
                                <form>
                                    <group>
                                        <field name="state" widget="statusbar"/>
                                        <field name="name"/>
                                        <field name="emission_date"/>
                                        <field name="expire_date"/>
                                        <field name="number"/>
                                        <field name="issuer_partner_id"/>
                                        <field name="note"/>
                                    </group>
                                </form>
                            </field>
                        </page>
                    </notebook>