[FIX] pos_hr: make employee selection work again
[FIX] pos_hr: make employee selection work again

this is undefined, use self.

Oversight of 5f3b5f0a9da42f4d94c70d7e3cff98229db941fc.

closes odoo/odoo#32860

Signed-off-by: Aaron Bohy (aab) <40b904fd8852297daeaeb426b1bca46fd2454aa3@odoo.com>
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo