title: ToggleButton Has No Unchecked State in UWP
body: <p>I am working with Visual States in a ToggleButton template within a Windows 10 UWP app.</p>
  
  <p>I have added an animation for the 'Checked' state so when checked, an icon within the template rotates 90 degrees over 250 milliseconds.</p>
  
  <p>Now I want to animate the icon rotating back to normal over the same 250 millisecond timespan when the ToggleButton is no longer checked.</p>
  
  <p>Problem is, there is no 'Unchecked' state to animate anymore for ToggleButton - so it seems like this is impossible.</p>
  
  <p>Surely I have this wrong somehow - so has anyone managed to animate a ToggleButton moving to the 'Unchecked' state (which apparently no longer exists??????)</p>
  
  <p>Thanks</p>
  
  <p>Dean</p>