Duration Widget is used to enter time duration.
  It may be used in movement of Labour (in Task, Calendar Period, ...).

  Time duration in ERP5 are saved ALWAYS IN SECOND.
  
  The field purpose is to display second quantity in hour, minute and second,
  in order to make it more user friendly.



git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@12585 20353a03-c40f-0410-a6d1-a30d3c3de9de