[Feature]: Always validate after submit

[sdriffill-tm]

What is the new or updated feature that you are suggesting?

I would like to be able to specify validation behaviour options such that validation happens:

1. onSubmit
2. and then onBlur after the 1st submit

Why should this feature be included?

Depending on the form, in many cases I find this a good level of user feedback. The user may initially jump around the form to the extent that validating onBlur from the outset is intrusive, but then after the 1st submit, we expect the form to be in a finalised state and can make our feedback more regular.

In conform this can be implemented via a combination of props:

shouldValidate: 'onSubmit',
shouldRevalidate: 'onBlur',
...

[sdriffill-tm]

Self-closing as have realised functionality is already implemented via combination of:

validationBehavior={{
  initial: 'onSubmit',
  whenTouched: 'onSubmit',
  whenSubmitted: 'onBlur',
}}