server-tools/unserialize_field/ir_model_fields.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data>
        <record id="view_model_fields_form" model="ir.ui.view">
            <field name="type">form</field>
            <field name="model">ir.model.fields</field>
            <field name="inherit_id" ref="base.view_model_fields_form" />
            <field name="arch" type="xml">
                <data>
                    <field name="serialization_field_id" position="after">
                        <button type="object" name="action_unserialize_field"
                            string="Unserialize field" colspan="4"
                            attrs="{'invisible': ['|', ('serialization_field_id','=',False), ('state', '!=', 'manual')]}"
                            />
                    </field>
                </data>
            </field>
        </record>

        <record id="view_model_form" model="ir.ui.view">
            <field name="type">form</field>
            <field name="model">ir.model</field>
            <field name="inherit_id" ref="base.view_model_form" />
            <field name="arch" type="xml">
                <data>
                    <field name="serialization_field_id" position="after">
                        <button type="object" name="action_unserialize_field"
                            string="Unserialize field" colspan="4"
                            attrs="{'invisible': ['|', ('serialization_field_id','=',False), ('state', '!=', 'manual')]}"
                            />
                    </field>
                </data>
            </field>
        </record>
    </data>
</openerp>