[IMP] website: allow customize option to be conditionally visible
[IMP] website: allow customize option to be conditionally visible

Before this commit, in the theme customize modal, only lists were able
to be visible under the condition of a subset of options being enabled.
Now options can too.

PR https://github.com/odoo/odoo/pull/29624
task-1904244
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo