title: Angular ag-grid cell renderer checkbox not refresh value
body: <p>I created cell renderer for checkbox input but when I click checkbox it change the value inside but not on the cell.  </p>
  
  <p>See plunker example: <a href="https://plnkr.co/edit/z2BrMcFtneZTeWwnxjFs?p=preview" rel="nofollow noreferrer">Plunker</a></p>
  
  <p><code>refresh</code> method should be called on change but somehow it is not. </p>
  
  <p><code>onCellClicked</code> function returns still same value no matter how I click on checkbox.</p>
  
  <p>I tried <code>cellEditor: 'agRichSelect'</code> with two possible values <code>true</code> and <code>false</code> which worked fine but I need checkbox.</p>
  
  <p>Thaks for any ideas!</p>