[IMP] sale: propagate token use to invoices when viewing order on customer portal
[IMP] sale: propagate token use to invoices when viewing order on customer portal

Customers can access orders using an access token. Order page view may
contain links to invoices linked to that order. However currently the link
does propagate the use of access token and therefore leads to a crash due
to access rights error. This is improved here by adding the invoice access
token in the embedded links.

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