title: React Material UI Multiline Textfield OnSubmit won't fire
body: <p>I'm trying to design a text input box similar to Slack's style.  Where you can do <kbd>Ctrl</kbd>+<kbd>Enter</kbd> to do a newline and <kbd>Enter</kbd> to submit.  Is this feasible with Material UIs textfield or even Material UI at all?</p>
  
  <p>Thanks! </p>