title: jquery multiselect - remove "un-checkall" link?
body: <p>is there anyway to remove the "uncheck- all" link from the heaer?</p>
  
  <p>Im using ehynds version</p>
  
  <p><a href="https://github.com/ehynds/jquery-ui-multiselect-widget" rel="nofollow noreferrer">https://github.com/ehynds/jquery-ui-multiselect-widget</a></p>
  
  <pre><code>$('#dropDown').multiselect({
       noneSelectedText: 'Filter',
       selectedText: 'Filter',
  }); 
  </code></pre>
  
  <p>Example screenshot from their website
  <a href="https://i.stack.imgur.com/FEnMj.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/FEnMj.png" alt="enter image description here"></a></p>