[FIX] website: restore color order for themes with more than 5 colors
[FIX] website: restore color order for themes with more than 5 colors

Broken by [1] (example: in treehouse, which has currently 6 colors,
primary was after secondary).

[1]: https://github.com/odoo/odoo/commit/6fb4ed44a04008a81f860fa24a63d444d70f56b6

Part of https://github.com/odoo/odoo/pull/49993

X-original-commit: 6aab08cbdbc3459d2cd2c1fb1f1f3b9f1bbaa4db
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo