[IMP] account: Display 'Draft Invoice' instead of false on name_get

name_get() override when payment in draft display the result false.

screenshot : https://drive.google.com/file/d/1dT22ysXmSOJvXMhzhyh_0tVW9z_v3b-s/view?usp=drivesdk

closes odoo/odoo#27537

addons/account/models/account_payment.py

@@ -392,6 +392,10 @@ class account_payment(models.Model):
     _description = "Payments"
     _order = "payment_date desc, name desc"
 
+    @api.multi
+    def name_get(self):
+        return [(payment.id, payment.name or _('Draft Payment')) for payment in self]
+
     @api.multi
     @api.depends('move_line_ids.reconciled')
     def _get_move_reconciled(self):