title: Setting state inside event handler which is inside state properties
body: <p>I've got a problem updating a state from an event which is inside this state. I mean I've got a dynamic form and this one must have an event inside their properties. I coded a small component with my problem, the code is in the url <a href="https://codesandbox.io/s/material-demo-4wsib" rel="nofollow noreferrer">https://codesandbox.io/s/material-demo-4wsib</a></p>