Modal submit handle error

[DavidShefcik]

When a modal is submitted we should have some way to prevent the modal from being closed. For example, when you have a form in the modal that gets submitted when the ok button is clicked but the form validation fails, prevent the modal from being closed and show the form errors.

[DavidShefcik]

Pass a function to the onSubmit and onCancel functions that would get called to hide the modal