title: Select value from xtype selection type checkbox CQ5
body: <p>Hello I am running an issue right now. I would like to make the checkbox state: checked but I could not make the defaultValue="value"</p>
  
  <pre><code>&lt;channels jcr:primaryType="cq:Widget" fieldLabel="Channels"
                  defaultValue="Value" name="channels" options="/bin/sample/private/getJSON.json"
                   optionsValueField="Value" type="checkbox" xtype="selection"&gt;
  </code></pre>
  
  <p>I have tried to do this: <a href="https://stackoverflow.com/questions/10483546/getting-default-checked-checkbox-in-cq5">Getting Default Checked Checkbox in CQ5</a></p>
  
  <p>but it didn't solve the issue.</p>