Make sure that global search column acts as a normal search column (i.e. it will be passed to count* & search methods and work fine).
Remove hard coded script to extract global search column value. Use request (resp. selection) to get it.
Add proper i18n.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@38298 20353a03-c40f-0410-a6d1-a30d3c3de9de