title: Reset form to empty values
body: <p>new to redux-form... I was looking at an example from redux-form docs where one can initialize form values from initialValues (forked example here: <a href="https://codesandbox.io/s/6v3n9lwnpr" rel="nofollow noreferrer">https://codesandbox.io/s/6v3n9lwnpr</a>).
  Is it possible to have functionality where one can use 'Undo Changes' to reset form to InitialValues, but also have another button to reset to empty form?</p>