title: formcontrol with updateOn: blur doesn't update values when submitting
body: <p>Ok so I'm having the following issue:<br>
  I have a form with a form group and a few form controls.
  these form controls update on blurring the input with the <code>updateOn: 'blur'</code> setting. Now this works fine when pressing the submit button however I run into issues when submitting the form by pressing enter.</p>
  
  <p>Here's a plunkr reproducing the issue: <a href="https://embed.plnkr.co/rMbRg85LK0MC6rUw99qG/" rel="nofollow noreferrer">https://embed.plnkr.co/rMbRg85LK0MC6rUw99qG/</a></p>