title: jquery ui modal window: normal radio button or select elements don't respond to click
body: <p>When I call a jQuery UI dialog and set <code>modal: false</code>, I can click on normal (non-UI) html radio buttons <strong>inside the dialog</strong> with no problem. </p>
  
  <p>But when <code>modal: true</code>, then the radio buttons <strong>inside the dialog</strong> don't respond to click events.</p>
  
  <p>Is there a simple explanation for this behavior? </p>