title: FabricJs group selection JSON stringify
body: <p>I want to make a history of my options in FabricJs. I used an example from here and it works well exept if I select 2 object and move them. </p>
  
  <p>When I select 2 object or more they move a half the width of the bounding box bottom and right and when I deselect them they move a on left and top.</p>
  
  <p>Here is the JsFiddle</p>
  
  <p><a href="http://jsfiddle.net/be1xc5xs/" rel="nofollow">http://jsfiddle.net/be1xc5xs/</a></p>
  
  <pre><code>function updateModifications(savehistory) {
      if (savehistory === true) {
          myjson = JSON.stringify(canvas); // this is the problem
          state.push(myjson);
      }
  }
  </code></pre>