[IMP] mail: update mail activity view form

Before this task, the default description and the scheduled date were placed in the left column. A lot of space was lost.

closes odoo/odoo#41090

Taskid: 2119620
Related: odoo/enterprise#6960
Signed-off-by: Damien Bouvy (dbo) <dbo@odoo.com>

addons/mail/views/mail_activity_views.xml

@@ -32,9 +32,6 @@
                                 domain="[('model_id', '=', res_model_id)]"
                                 attrs="{'invisible': [('res_model_id', '=', False)]}"
                                 context="{'default_model_id': res_model_id}"/>
-                        </group>
-                        <group>
-                            <field name="default_description"/>
                             <label for="delay_count"/>
                             <div>
                                 <div class="o_row">
@@ -45,6 +42,9 @@
                             </div>
                         </group>
                     </group>
+                    <group>
+                        <field name="default_description"/>
+                    </group>
                     <p class="alert alert-info" role="alert" attrs="{'invisible': [('res_model_change', '=', False)]}">Modifying the model can have an impact on existing activities using this activity type, be careful.</p>
                 </sheet>
             </form>