* update PaySheetTransaction_view and PaySheetModel_view to display payment_condition_payment_date only if cutom payment_condition_trade_date is selected.
* fix typo

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@25731 20353a03-c40f-0410-a6d1-a30d3c3de9de