react-unknown-prop warning on input tag

[monte-hayward]

steps: clone, setup, run start, browse /

apologies if this is a grommet issue.

Warning: Unknown props `initialValue`, `autofill`, `onUpdate`, `valid`, `invalid`, `dirty`, `pristine`, `active`, `touched`, `visited`, `autofilled` on <input> tag. Remove these props from the element. For details, see https://fb.me/react-unknown-prop
    in input (created by WelcomeModal)
    in span (created by FormField)
    in div (created by FormField)
    in FormField (created by WelcomeModal)
    in div (created by FormFields)
    in FormFields (created by WelcomeModal)
    in form (created by Form)
    in Form (created by WelcomeModal)
    in div (created by Box)
    in Box (created by WelcomeModal)
    in div (created by LayerContents)
    in LayerContents

[RyanCCollins]

I think this is caused by redux form. I am not sure when I will have time to fix this, but will definitely accept a PR if you get around to it. Thanks!