SaveButton renders disabled if Form is pristine.

[WiXSL]

Implements #4733

[fzaninotto]

This is technically a new feature, please PR against next rather than master.

[kopax]

Excellent. I wonder how I did miss the <SaveButton />. I would not have added such good test anyway it's a good job. Thank you so much @WiXSL for supporting the feature!

Side question, since pristine and disabled can be found at the same place, why did you decide not to add the submitting to disabled props? This would prevent an user to submit a form multiple time:

disabled={submitting || disabled || pristine}

[WiXSL]

@kopax The saving prop is already handling that issue in the SaveButton component.

[fzaninotto]

Thanks!

[kopax]

I can't get this to work in newest 3.6.0, see #4733 (comment)