This commit fix the users login disappearance when
hitting 'Change Password' button without setting a
password by adding force_save parameter. It also
removes the required parameter from the new_passwd
field so we don't get a vague missing field error
when one omits to enter a new password. Instead of
an error, we just leave the old password for the
missing lines.
Task-3184727
Part-of: odoo/odoo#112806
Patrick Hoste
cde4a9c647