[IMP] sms: autofocus on "body" for valid phone number in single mode

Before Commit:
When users wants to send an SMS to someone with help of the phone widget,
the composer is opened, and users expect to be able to write the message
right away. The issue is that the default focus is on the phone number, so
if users start writing, it will corrupt the phone nubmber, and they have to
discard the changes and have to click the body to finally start typing SMS
content.

After Commit:
When the composer is opened, if the phone number is valid, 'body' field is
focused automatically so that users can start typing right away. If number
is not valid, the focus will still be on the phone number. This is managed
by providing 'default_focus' attibute on the body field, which appears or
is hidden as needed.
For the mass mode also, we simply focus on the body field to enable user
to start writing content right away.

closes odoo/odoo#65443

Task-id: 2394488
Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>

addons/sms/wizard/sms_composer_views.xml

@@ -48,7 +48,8 @@
                             <field name="recipient_single_number_itf" class="oe_inline" nolabel="1" options="{'onchange_on_keydown': True}" placeholder="e.g. +1 415 555 0100"/>
                         </div>
                                                 
-                        <field name="body" widget="sms_widget"/>
+                        <field name="body" widget="sms_widget" attrs="{'invisible': ['|', ('comment_single_recipient', '=', False), ('recipient_single_valid', '=', True)]}"/>
+                        <field name="body" widget="sms_widget" attrs="{'invisible': [('comment_single_recipient', '=', True), ('recipient_single_valid', '=', False)]}" default_focus="1"/>
                         <field name="mass_keep_log" invisible="1"/>
                     </group>
                 </sheet>