title: Enable select2 multi-select search box
body: <p>I need to be able to add a search box to my multi-select fields using select2.</p>
  
  <p>For whatever reason, while search boxes appear as expected in single-select fields, the same select2() call on a multi-select field does not add a search box.</p>
  
  <pre><code>var data = []; // Programatically-generated options array with &gt; 5 options
  var placeholder = "select";
  $(".mySelect").select2({
      data: data,
      placeholder: placeholder,
      allowClear: false,
      minimumResultsForSearch: 5});
  </code></pre>
  
  <p>Does select2 not support search boxes with multi-selects? Does anyone have a good similarly-functioning alternative?</p>