server-tools/server_action_navigate/views/view_ir_actions_server.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!--
Copyright (C) 2020 - 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).
-->
<odoo>
    <record id="view_ir_actions_server_form" model="ir.ui.view">
        <field name="model">ir.actions.server</field>
        <field name="inherit_id" ref="base.view_server_action_form" />
        <field name="arch" type="xml">
            <xpath expr="//page[@name='code']" position="after">
                <page
                    string="Navigation Options"
                    name='page_navigate'
                    autofocus="autofocus"
                    attrs="{'invisible': [('state', '!=', 'navigate')]}"
                >
                    <group>
                        <field name="max_navigate_line_sequence" invisible="1" />
                        <field name="max_navigate_line_model" invisible="1" />
                        <!-- we can check emptyness of a 2many like this since v10 i think /-->
                        <button
                            name="delete_last_line"
                            string="Delete Last Line"
                            type="object"
                            attrs="{'invisible': [('navigate_line_ids', '=', [])]}"
                        />
                        <field
                            name="navigate_line_ids"
                            context="{'navigate_line_ids': navigate_line_ids}"
                            nolabel="1"
                            colspan="4"
                        >
                            <tree editable="bottom" delete="false">
                                <!-- the handle widget takes care of the sequence /-->
                                <field
                                    name="sequence"
                                    widget="handle"
                                    invisible="True"
                                />
                                <field name="field_id" />
                                <field name="field_model" />
                            </tree>
                        </field>
                        <field
                            name="navigate_action_id"
                            attrs="{'invisible': [('navigate_line_ids', '=', [])]}"
                        />
                    </group>
                </page>
            </xpath>
        </field>
    </record>
</odoo>