Since commit [1], the custom filter for website was disabled. This commit restores the filter and adapts it for "Milk" redesign. Steps to reproduce: * Open the Website app * Select the menu "Site" -> "Pages" * Open the "Dropdown" in the SearchBar => Bug there is no filter for website [1]: odoo/odoo@caef16ee4e closes odoo/odoo#124042 X-original-commit: 9237ca777fb9c5e9bda03c2d0dbe0deed8e1b2e5 Signed-off-by: Pierre Paridans (app) <app@odoo.com>