minor fix

app/mainwindow.py

@@ -1006,7 +1006,6 @@ class MainWindow(FrontWindow):
             return
         if not self.validate_payment_term():
             return
-        self.field_invoice_type.set_enabled(False)
         sale_id = self._sale['id']
         res, msg = self.ModSale.faster_process({'sale_id': sale_id})
         # Remove deprecation res['res']
@@ -1024,6 +1023,8 @@ class MainWindow(FrontWindow):
             res = self._print_order(sale_id, 'delivery')
             self.createNewSale()
             return
+        if self.type_pos_user != 'cashier':
+            self.field_invoice_type.set_enabled(False)
 
         self.message_bar.set('enter_payment', self.default_journal['name'])
         self.set_state('cash')