fix(stateful): use provided prop instead of default value if provided.

[m0ksem]

I see how I can create form data with a new form, but how would I prepopulate data?

I cant do myForm.formData.value = {} as SomeType, because .value is readonly. Is formData only able to used to create records and not edit them? I was wondering about this approach because I'm experiencing issues with clearing a form by setting the v-model object to empty or null which immediately fires the form validation. This happens wether or not I call reset() or try and use resetValidation() to clear messages.

Fix this example: https://ui-experimental.vuestic.dev/play#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

[m0ksem]

Looks good for me after week + we tested it with experimental version.