mail-addons/mail_move_message_views.xml

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

<template id="assets_backend" name="custom bar assets" inherit_id="web.assets_backend">
    <xpath expr="." position="inside">
        <link rel="stylesheet" href="/mail_move_message/static/src/css/mail_move_message.css"/>
        <script type="text/javascript" src="/mail_move_message/static/src/js/mail_move_message.js"></script>
    </xpath>
</template>

<record id="view_wizard" model="ir.ui.view">
    <field name="name">mail_move_message.wizard.view</field>
    <field name="model">mail_move_message.wizard</field>
    <field name="arch" type="xml">
        <form string="Move Message">
            <field name="can_move" invisible="1"/>

            <p  attrs="{'invisible':[('can_move', '!=', False)]}">You cannot move this message. It was already moved with a message bellow. Open one and apply changes there.</p>
            <group attrs="{'invisible':[('can_move', '!=', False)]}">
                <field name="message_moved_by_message_id" context="{'extended_name':1}"/>
                <field name="message_moved_by_user_id"/>
                <button name="open_moved_by_message_id" string="Open message" type="object" class="oe_highlight"/>
            </group>
            <group attrs="{'invisible':[('can_move', '=', False)]}">
                <field name="parent_id" domain="[('parent_id','=', False)]" context="{'extended_name':1}" />
                <field name="move_back" attrs="{'invisible':[('message_moved_by_user_id','=',False)]}"/>
                <field name="model_id" class="oe_inline" />
                <field name="res_id" class="oe_inline" />
                <field name="record_url" class="oe_inline" widget="url"/>
            </group>
            <separator string="Message"/>
            <div style="height:200px;overflow-y:auto;">
                <field name="message_id" invisible="1"/>
                <field name="message_body"/>
            </div>
            <footer>
                <button name="move" string="Move" type="object" class="oe_highlight" attrs="{'invisible':[('can_move', '=', False)]}"/>
                <button string="Cancel" class="" special="cancel" />
            </footer>
        </form>
    </field>
</record>

    </data>
</openerp>