ext:form | allow multiple usage of formfinishers in GUI
Right now it is only possible to use the same finisher more than once in a form, if the YAML file is edited directly.
In the TYPO3-BE this can not be done, as all active finishers are removed from the finisher-selection dropdown.
Also, if the same finisher is used at least twice, only one – the first occurrence – can be edited in the TYPO3-BE. So the order has to be changed constantly to view the values of another instance.