Pristine and dirty shouldn't change between wizard pages.

### Are you submitting a **bug report** or a **feature request**?

Bug report

### What is the current behavior?

1. Fill first and last name (`pristine` should change to `false`)
2. Click next
3. **`pristine` back to `true`**
4. Back to previous page
5. **`pristine` is still `true`**

### What is the expected behavior?

`pristine` and `dirty` shouldn't change between wizard pages.

or:

There should be other way, to check state of fields that are not currently in the DOM.

### Sandbox Link

https://codesandbox.io/s/wizard-field-state-gfevw?file=/Wizard.js

### What's your environment?
n/a

### Other information

I have multi-paged form (without `validate` on each page) and I want to block submitButton, when nothing has changed.