fix: PHP Fatal error:  Uncaught TypeError: QUI\ERP\Comments::__construct(): Argument #1 ($comments) must be of type array, null given

feat: Calc -> convert transactions with a different currency to the currency of the object to be calculated

feat: UserData -> auto-insert contact person email address when selecting contact person via address

fix: UserData -> set all unset attributes to false instead of undefined; always trigger change on customer select; fix: address select load correct address