add preference field to store which float input style we want to use in all the application.

Modify some proxyfields to get the value from this property. If no value is defined, the value the proxyfield have before is used, in this way, this change should not have impact for people who don't define this preference field.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@29322 20353a03-c40f-0410-a6d1-a30d3c3de9de