minor fix

app/main.py

@@ -2544,6 +2544,7 @@ class AppWindow(FrontWindow):
         if hasattr(self, 'field_list_price'):
             ctx = {'price_list': self.field_list_price.get_id()}
         res = self.Sale.faster_add_product(data, ctx=ctx)
+        res['sale'] = self._sale['id']
         self._sale_line = res
         self._current_line_id = res['id']
         self.add_sale_line(res)
@@ -3079,7 +3080,6 @@ class AppWindow(FrontWindow):
         self.sign_text_changed(value)
 
     def key_backspace_pressed(self):
-        print('backspace presed2222')
         if self._sign or self._state in ('checkout', 'payment'):
             self._amount_text = self._amount_text[:-1]
             self.amount_text_changed()