server-tools/scheduler_error_mailer/views/ir_cron.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  scheduler_error_mailer for Odoo
  Copyright (C) 2012-2013 Akretion Sébastien BEAU,David Beal,Alexis de Lattre
  Copyright (C) 2016 Sodexis
  Copyright (C) 2018 bloopark systems (<http://bloopark.de>)
  The licence is in the file __openerp__.py
-->

<odoo>

    <record id="ir_cron_view" model="ir.ui.view">
        <field name="name">ir.cron.error.mailer.form</field>
        <field name="model">ir.cron</field>
        <field name="inherit_id" ref="base.ir_cron_view_form"/>
        <field name="arch" type="xml">
            <field name="doall" position="after">
                <field name="email_template_id"/>
            </field>
        </field>
    </record>

</odoo>