social/mail_notification_email_template/views/mail_message_subtype.xml

<?xml version="1.0" encoding="UTF-8"?>
<openerp>
    <data>
        <record id="view_mail_message_subtype_form" model="ir.ui.view">
            <field name="model">mail.message.subtype</field>
            <field name="inherit_id" ref="mail.view_mail_message_subtype_form" />
            <field name="arch" type="xml">
                <field name="description" position="after">
                    <field name="template_id" context="{'default_model_id': %(mail.model_mail_notification)d}" />
                </field>
            </field>
        </record>
    </data>
</openerp>