Step for checking the entered datas

[Portugao]

It would be fine, if there would be a possibility, to activate a optional step before sending the form.
So it's possible to have a look at his data before sending them.

[espaan]

It is currently the case that a bad vadliation will not result in data loss. The data will then be available again.
But indeed an optional validate stage would be nice. Maybe together with an update to Symfony Forms