server-tools/cron_inactivity_period/views/ir_cron.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--
Copyright (C) 2018 - Today: GRAP (http://www.grap.coop)
@author: Sylvain LE GAL (https://twitter.com/legalsylvain)
License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
-->
<openerp><data>

    <record id="view_ir_cron_form" model="ir.ui.view">
        <field name="model">ir.cron</field>
        <field name="inherit_id" ref="base.ir_cron_view" />
        <field name="arch" type="xml">
            <field name="doall" position="after">
                <newline />
                <group string="Inactivity Periods" colspan="4">
                    <field name="inactivity_period_ids" nolabel="1">
                        <tree editable="bottom">
                            <field name="type"/>
                            <field name="inactivity_hour_begin" attrs="{'invisible': [('type', '!=', 'hour')]}" widget="float_time"/>
                            <field name="inactivity_hour_end" attrs="{'invisible': [('type', '!=', 'hour')]}" widget="float_time"/>
                        </tree>
                    </field>
                </group>
            </field>
        </field>
    </record>

</data></openerp>