Merge pull request #1021 from odoo-dev/saas-5-fix-routing-for-index-chm

[FIX] website: if the first menu referred to a website page and the route for this path is overwritten, the route is not used, the template has not the values of the route. (e.g. contact-us menu in first position if website_crm is installed)
[FIX] website_crm: the path '/crm/contactus' have an error if you doesn't use the website contact form or if you reload the page, instead of redirect to contact form.