A date filter with an empty value would still create a domain filtered on the current year instead of being bypassed. closes odoo/odoo#148984 Task: 3668916 X-original-commit: 763f88e2d45cb7ba107db135eecd0365ba2b8c8b Related: odoo/enterprise#54095 Signed-off-by: Pierre Rousseau (pro) <pro@odoo.com> Signed-off-by: Rémi Rahir (rar) <rar@odoo.com>