title: jQuery draggable and appendTo doesn't work
body: <p>I use jQuery ui draggable but the option appendTo doesn't work. However other option like containment or grid work properly. Here is the code:</p>
  
  <p>HTML</p>
  
  <pre><code>&lt;div id="demo"&gt;
  &lt;/div&gt;
  &lt;div id="sidebar"&gt;
      &lt;div class="item"&gt;
      &lt;/div&gt;
      &lt;div class="item"&gt;
      &lt;/div&gt;
      &lt;div class="item"&gt;
      &lt;/div&gt;
      &lt;div class="item"&gt;
      &lt;/div&gt; 
  &lt;/div&gt;
  </code></pre>
  
  <p>script</p>
  
  <pre><code>jQuery(".item").draggable({ appendTo: "#demo", grid: [ 10, 10 ], containment: "#demo" });
  </code></pre>
  
  <p>CSS</p>
  
  <pre><code>#demo {
      width: 500px;
      height: 500px;
      border: 1px solid black;
      float: left;
  }
  #draggable {
      background: red;
      width: 50px;
      height: 50px;
  }
  #sidebar {
      float: left;
      width: 300px;
  }
  .item {
      cursor: pointer;
      background: black;
      width: 100px;
      height: 100px;
      margin: 10px;
  }
  </code></pre>
  
  <p>Here is a live demo: <a href="http://jsfiddle.net/fzjev/">http://jsfiddle.net/fzjev/</a></p>