title: Exception raised during rendering: -1 when adding ToggleButton
body: <p>When adding (manually or drag/drop) ToggleButton to layout, I got this message:</p>
  
  <pre><code>Exception raised during rendering: -1
  Exception details are logged in Window &gt; Show View &gt; Error LogThe graphics preview in the layout editor may not be accurate:
  Different corner sizes are not supported in Path.addRoundRect. (Ignore for this session)
  Path.isConvex is not supported. (Ignore for this session)
  </code></pre>
  
  <p>Every other button work fine.Talking about Eclipse.</p>
  
  <p>e:Seems like API 21 does not work with togglebutton when API5 works. Is should not be like that, right?</p>