Changes the order reference from a random string to a random number or order ID.
This module was used by many shops, but deleted some time ago from this forum by one nasty user.
People keep asking me for it, so here it is reuploaded.
Still works for Prestashop 1.6, 1.7 and 8.0.
New version - to make sure the new override is applied, I recommend to reinstall and reconfigure the module.