[ADD]Add description field event

views/event_views.xml

@@ -29,6 +29,11 @@
                 <field name="type_event_cg" />
                 <field name="mail_ext_allowed" />
             </field>
+            <xpath expr="//notebook" position="before">
+                <group>
+                    <field name="description"/>
+                </group>
+            </xpath>
         </field>
     </record>