res_users_view.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  Copyright (C) 2012-2015 Akretion (http://www.akretion.com/)
  @author: Alexis de Lattre <alexis.delattre@akretion.com>
  The licence is in the file __openerp__.py
-->

<openerp>
<data>

<!-- Add option on user form view -->
<record id="view_users_form" model="ir.ui.view">
    <field name="name">crm.phone.res.users.form</field>
    <field name="model">res.users</field>
    <field name="inherit_id" ref="base_phone.view_users_form"/>
    <field name="arch" type="xml">
        <!-- Phone tab is already invisible, cf base_phone -->
        <group name="phone-preferences" position="inside">
            <field name="context_propose_creation_crm_call"/>
        </group>
    </field>
</record>

<record id="view_users_form_simple_modif" model="ir.ui.view">
    <field name="name">crm.phone.preferences.option.view</field>
    <field name="model">res.users</field>
    <field name="inherit_id" ref="base_phone.view_users_form_simple_modif" />
    <field name="arch" type="xml">
        <!-- phone group is already invisible, cf base_phone -->
        <group name="phone" position="inside">
            <field name="context_propose_creation_crm_call" readonly="0"/>
        </group>
    </field>
</record>

</data>
</openerp>