title: jQuery JSTree "uncheck node" perfomance issue
body: <p>I'm getting a slow running script warning when I uncheck a large number of nodes in a jstree.</p>
  
  <p>I'm using a loop to go through an array to get the id's and then uncheck the nodes. Is there an alternative way of doing this or making it faster? In my particular case my array length is 1600.</p>
  
  <pre><code>$.each(myArray, function(key, item){
    $("#myTree").jstree("uncheck_node", "!#"+item);
  });
  </code></pre>