title: How to prevent PasswordTextField from clearing text when form is submitted?
body: <p>I have a button, when I click this button, the form is submitted and the validation is made. If the the password is invalid, I'd like it to stay there after the form is submitted.</p>
  
  <p>I tried to save the password in a var named <code>passwordStr</code> and then setting the model object of the PasswordTextField with this var, all this in the <code>onSubmit()</code> method of the form. Didn't work though.</p>
  
  <p>Is there a way to do what I want?</p>