Some actions are reusing report actions in exhange category by forcing the style used to spreadsheet. The should also force the format to be empty, to prevent having a format non compatible with the style.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@20693 20353a03-c40f-0410-a6d1-a30d3c3de9de