odoo/addons/live_support/live_support_view.xml

<?xml version="1.0"?>
<openerp>
    <data>
        <menuitem id="live_support" name="Live Support" parent="mail.mail_feeds_main" groups="group_live_support"/>

        <record model="ir.actions.act_window" id="action_support_channels">
            <field name="name">Support Channels</field>
            <field name="res_model">live_support.channel</field>
            <field name="view_mode">tree,form</field>
        </record>
        <menuitem name="Support Channels" parent="live_support" id="support_channels" action="action_support_channels" groups="group_live_support"/>


        <record id="view_order_form" model="ir.ui.view">
            <field name="name">support_channel.form</field>
            <field name="model">live_support.channel</field>
            <field name="arch" type="xml">
                <form string="Support Channels" version="7.0">
                <sheet>
                    <h1>
                        <field name="name"/>
                    </h1>
                    <div style="margin-bottom: 12px">
                        <button type="object" name="join" string="Join" attrs='{"invisible": [["are_you_inside", "=", True]]}'/>
                        <button type="object" name="quit" string="Quit" attrs='{"invisible": [["are_you_inside", "=", False]]}'/>
                    </div>
                    <field name="are_you_inside" invisible="1"/>
                    <label for="user_ids" colspan="2"/>
                    <field name="user_ids" readonly="1" nolabel="1" colspan="2"/>
                </sheet>
                </form>
            </field>
        </record>


    </data>
</openerp>