title: Set focus to search text field when we click on select 2 drop down
body: <p>I am using select2.js Version: 3.4.3 with bootstrap
  I have one drop down.</p>
  
  <p><img src="https://i.stack.imgur.com/ZREaw.png" alt="enter image description here"></p>
  
  <p>When I click on drop down i got list with search text fields.
  But I my cursor not focused on search text fields.
  <img src="https://i.stack.imgur.com/3Ao8I.png" alt="enter image description here"></p>
  
  <pre><code>&lt;form:select path="yearAge" id="yearAgeId"
      cssClass="form-control search-select static-select"&gt;
      &lt;form:option value=""&gt;Years&lt;/form:option&gt;
      &lt;c:forEach var="i" begin="1" end="125"  &gt;
      &lt;form:option value="${i}" label="${i}"&gt;&lt;/form:option&gt;
      &lt;/c:forEach&gt;     
  &lt;/form:select&gt;
  
  
  $(".search-select.static-select").select2({
      placeholder: $(this).attr('placeholder'),
      allowClear: true
  });
  </code></pre>
  
  <p>When I click on dropdown cursor focus should set to search text field automatically .</p>
  
  <p>Thank you...!!!!!</p>