- split the field my_logo (ENSEIGNE SIGLE) into two fields : my_sign and my_initials
scripts have not been updated with this new fields names and should be done by thibaut in few time.
- changes all fields numbers (to be able to add new fields at the top of the form). Now fields number are by five in five (5, 10, 15 , 20). In this way, it's easy to add more fields
- remove tales expression on checkbox fields because it was not usefull and generate some error messages in zope log.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@22824 20353a03-c40f-0410-a6d1-a30d3c3de9de