[FIX] gamification: always show the list of users
[FIX] gamification: always show the list of users

It is an important information as it is different that the domain.
The users computed with the domain are added to the list, never removed.

closes odoo/odoo#36033

Signed-off-by: Martin Trigaux (mat) <cc7c5be316e48d137cbb549833b85d91034d799d@odoo.com>
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo