Before this revision, it was possible to use the `/website/image` controller using kwargs only e.g. `/website/image?field=datas&model=ir.attachment&id=718207` After, it's no longer possible. It was assumed `/website/image` without any argument in the route itself (`<xmlid>`, `<field>`, ...) could simply never be called, but this is not the case. We therefore restore it by retro-compability purposes.