This commit make it possible for design theme tours to define preconditions based on the CSS variables in order to make sure that the tour is run within a website that has the specific theme applied. See https://github.com/odoo/design-themes/pull/590. task-2687506 closes odoo/odoo#101119 X-original-commit: b29e17765f4e912b2dd472493b5be500b3a32c87 Related: odoo/design-themes#594 Signed-off-by: Romain Derie (rde) <rde@odoo.com>