social/email_template_configurator/views/email_template.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright 2018 ACSONE SA/NV
     License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl). -->

<openerp>
<data>

    <record model="ir.ui.view" id="email_template_form_view">
        <field name="name">email.template.form (in email_template_configurator)</field>
        <field name="model">email.template</field>
        <field name="inherit_id" ref="email_template.email_template_form"/>
        <field name="arch" type="xml">
            <xpath expr="//page[.//field[@name='model_object_field']]" position="attributes">
                <attribute name="groups">email_template_configurator.group_email_template_placeholders_manager</attribute>
            </xpath>
            <xpath expr="//page[.//field[@name='model_object_field']]" position="after">
                <page name="configured_placeholders" string="Configured Placeholders">
                    <group>
                        <field name="placeholder_id"
                               domain="[('model_id','=',model_id)]"
                               options="{'no_quick_create':True,'no_create_edit':True}"/>
                        <field name="placeholder_value"/>
                    </group>
                </page>
            </xpath>
        </field>
    </record>

</data>
</openerp>