title: placeholder text for chosen plugin for single select not working
body: <p>I have the chosen plugin for single select implemented in my code. I am trying to add the Placeholder text for the search boxes but I am not able to. I have tried the following things:</p>
  
  <pre><code>&lt;select id="search_pi" name="search_pi" type="text" class="chosen-select"
          style="width:450px;" onchange="this.form.submit()" &gt;
  
    &lt;option value=""&gt;Search Project/Initiative...&lt;/option&gt;
    &lt;?php
      include "../includes/search_dropdown.php";
      foreach($proj_ini_Array as $qa){
        echo "&lt;option value = \"$qa\"&gt;$qa&lt;/option&gt;";
      }
    ?&gt;
  </code></pre>
  
  <p>JS </p>
  
  <pre><code>&lt;script&gt;
    $(document).ready(function() {
      $('.chosen-select').chosen({
        placeholder_text_single: "Select an option",
        no_results_text: "Oops, nothing found!"
      });  
    });
  &lt;/script&gt;
  </code></pre>
  
  <p>In the select field, I also tried using <code>data-placeholder="Select an option"</code> but that does not help too. Can someone please let me know what am I missing?</p>
  
  <p>Thanks in advance.</p>