Update quantity_sign on related Movement too

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@17624 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/MovementGroup.py

@@ -448,6 +448,7 @@ class QuantitySignMovementGroup(RootMovementGroup):
       return 1
     if self.sign == 0:
       self.sign = sign
+      self.setGroupEdit(quantity_sign=self.sign)
       return 1
     return self.sign == sign