Roadmap and Release 2.6.1

Detailed Changelog: - Fix: Nb of orders to process was wrong. - Fix: Menu for external users was not shown correctly. - Fix: Customer code was not correct on PDF it if contains special characters. - Fix: When deleting a subscription, end date was not updated. - Fix: Can't validate an order with a discount when stock is setup to decrease on order validation. - Fix: Can update price even with "NPR" VAT rates. - Fix: When product type is missing, description is not lost when adding new product lines. - Fix: Fatal error on htdocs/fourn/facture/fiche.php - Fix: Everybody should be able to make exports if allowed, not only admin user - Fix: Last character was lost when text end with n or r.