[FIX] web: date autocompletion should use user's locale

search bar does not suggest date field format based on user's locale and always shows based on mmddyy using Date.parse,  opw:615276

Note: starting in 9.0, datejs has been replaced by momentjs, so this
problem should be solved in a better way.
Merge branch '7.0' of https://github.com/odoo/odoo into 7.0-win32