Possibility to edit the naming convention further

The current solution is great, but it would be even better if we could add additional fields (i.e. Bank) to more easily find and name files. Also, It would be great to allow editing the convention further (an example could be: Date_invoice name_Bank + currency_Currency (again) + amount) so each user can not only change the order of the tokens, but also more freely build his own convention by leveraging the fields available