[Listbox] - Add hidden inputs that use the same name property as the root Listbox

[cevr]

Currently the native form support for the multiple attribute in a listbox adds hidden inputs with names like name[valueIndex]. This makes it a bit awkward to consume when trying to use the native FormData.getAll(name).

I do not know the use-case for the current implementation, but would it be possible to add another hidden input per value that uses the name given to the root Listbox?

[gafemoyano]

Hi, did you eventually figure out a way to retrieve multiple form values using FormData?

[cevr]

Yes, I created hidden inputs with the name given to the root inbox