title: Fabric.js - Moving an object under the selected object
body: <p>I have 2 objects (images) in my canvas.</p>
  
  <p><code>fc.item(0)</code> is a smaller image in the middle of the canvas. <code>fc.item(1)</code> is a large image, "frame". The user can't move it. When the user's trying to move the <code>fc.item(1)</code>, I wanna move the <code>fc.item(0)</code>, as if the user's moved on the <code>fc.item(1)</code>.</p>
  
  <p>Any idea, how can I do this? I tried to use the <code>fc.item(0).fire("object:moving")</code>, but this didn't work well.</p>