Inputs should be disabled whilst form is in loading state

[hisuwh]

Describe the bug
Setting the form to a loading state if returning a promise from the submit handler is a great new feature.

I believe the inputs should be disabled whilst in this loading state.
Currently, this is not the case meaning you can edit existing inputs whilst the submit button is "spinning".

Reproduction
https://formkit.link/a03e7b8b648463917105d9f75928b748

Desktop (please complete the following information):

• OS: Windows
• Browser Chrome
• Version 97.0.4692.71

[justin-schroeder]

👋 Interesting. This is a subjective slippery slope for sure, one that we admittedly tiptoed into by adding that automatically added submit button 😂

I'll leave this open to collect more community feedback on this. In the meantime, here's how you can do it today:

https://formkit.link/9a645bcc332ee42b51c09b8a8f0c1928