Feat cancel payment

l10n_mx_facturae/models/account_payment.py

     def replace_cfdi(self):
         """Cancel voucher cfdi by replacing with 1 MXN voucher"""
         for record in self:
-            self._cancel_cfdi()
+            record.cancel_cfdi()
+            record.action_draft()
+            record.action_cancel()
 
     def currency_rate(self):
         """Compute currency rate used for current voucher to display on XML

l10n_mx_facturae/views/account_payment.xml

         <field name="model">account.payment</field>
         <field name="inherit_id" ref="account.view_account_payment_form"/>
         <field name="arch" type="xml">
+             <button name="action_draft" position="attributes">
+                <attribute name="attrs">
+                    {'invisible': ['&amp;',('state', 'in', ('posted', 'cancel')),('cfdi_state', 'in', ('done', 'cancel'))]}
+                </attribute>
+            </button>
             <button name="action_post" position="after">
                 <button name="sign_payment" type="object" string="Sign"
                     class="oe_highlight"
                         ('cfdi_state', '!=', False)
                     ]}" />
                 <!--<button name="substitute_payment" type="object" string="Replace"
-                    attrs="{'invisible': ['|', ('cfdi_state', 'not in', ['signed', 'done']), ('state', '=', 'cancel')]}"/>
-                <button name="replace_cfdi" type="object" string="Cancel"
+                    attrs="{'invisible': ['|', ('cfdi_state', 'not in', ['signed',
+                    'done']), ('state', '=', 'cancel')]}"/>-->
+                <button name="replace_cfdi" type="object" class="btn-primary" string="Cancel"
                     confirm="Are you sure to cancel this payment?"
                     attrs="{'invisible': ['|', ('cfdi_state', 'not in', ['signed',
                     'done']), ('state', '=', 'cancel')]}"/>-->