* SaleOrder_viewMilestone/listbox: "quantity" was in editable columns but not in columns. This makes the listbox non editable. Remove listbox_quantity field and references.
* Show simulation state, not validation state, we are on the context of an order.
* Proxify the listbox and some other fields

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@23138 20353a03-c40f-0410-a6d1-a30d3c3de9de