server-tools/base_external_system/views/external_system_view.xml

<?xml version="1.0" encoding="utf-8"?>

<!--
    Copyright 2017 LasLabs Inc.
    License LGPL-3.0 or later (https://www.gnu.org/licenses/lgpl).
-->

<odoo>

    <record id="external_system_view_form" model="ir.ui.view">
        <field name="name">external.system.view.form</field>
        <field name="model">external.system</field>
        <field name="arch" type="xml">
            <form string="External System">
                <header>
                    <button name="action_test_connection"
                            type="object"
                            string="Test Connection" />
                </header>
                <sheet>
                    <group name="data">
                        <group name="group_server_data">
                            <field name="name" />
                            <field name="company_ids" widget="many2many_tags" />
                            <field name="remote_path" />
                            <field name="ignore_fingerprint" />
                        </group>
                        <group name="group_connection_data">
                            <field name="host" />
                            <field name="port" />
                            <field name="username" />
                            <field name="password" widget="password" />
                            <field name="system_type" />
                        </group>
                    </group>
                    <notebook>
                        <page string="Keys">
                            <group>
                                <group>
                                    <field name="private_key" />
                                </group>
                                <group>
                                    <field name="fingerprint" />
                                </group>
                            </group>
                        </page>
                    </notebook>
                </sheet>
                <footer />
            </form>
        </field>
    </record>

    <record id="external_system_view_tree" model="ir.ui.view">
        <field name="name">external.system.view.tree</field>
        <field name="model">external.system</field>
        <field name="arch" type="xml">
            <tree string="External Systems">
                <field name="name" />
                <field name="host" />
                <field name="port" />
            </tree>
        </field>
    </record>

    <record id="external_system_view_search" model="ir.ui.view">
        <field name="name">external.system.view.search</field>
        <field name="model">external.system</field>
        <field name="arch" type="xml">
            <search string="External Systems">

                <field name="name" />
                <field name="company_ids" />
                <field name="host" />
                <field name="port" />
                <field name="username" />

                <group expand="0" string="Group By">
                    <filter string="Host"
                            domain=""
                            context="{'group_by': 'host'}" />
                    <filter string="Port"
                            domain=""
                            context="{'group_by': 'port'}" />
                    <filter string="Username"
                            domain=""
                            context="{'group_by': 'username'}" />
                </group>

            </search>
        </field>
    </record>

    <record id="external_system_action" model="ir.actions.act_window">
         <field name="name">External Systems</field>
         <field name="res_model">external.system</field>
         <field name="type">ir.actions.act_window</field>
         <field name="view_type">form</field>
         <field name="view_mode">tree,form</field>
     </record>

    <menuitem id="menu_external_system"
              name="External Systems"
              parent="base.menu_custom"
              action="external_system_action"
              sequence="50" />

</odoo>