Change adds missing helpers and alters some of their messages
in differents parts of HR apps.
task-3522163
closesodoo/odoo#145268
X-original-commit: a2238763d4fad99da69a96104adf26b6d8eca938
Related: odoo/enterprise#52261
Signed-off-by: Bertrand Dossogne (bedo) <bedo@odoo.com>