title: jQuery Datepicker position issue on FireFox
body: <p>Somehow jQuery datepicker is displaying at the top of window instead of under input field on the FireFox when IE and Chrome works fine. There is no additional CSS or jQuery - just vanilla KnockoutJS with jQuery + jQuery UI and a default theme from there.</p>
  
  <p><a href="https://i.stack.imgur.com/2aagF.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/2aagF.png" alt="enter image description here"></a></p>
  
  <p>Code for datepicker looks like</p>
  
  <pre><code>$( function() {
      $( "#datepicker" ).datepicker({
          maxDate: "0",
          changeMonth: true,
          changeYear: true,
          showOn: "both",
          buttonImage: "css/images/calendar.png",
          buttonImageOnly: true,
          buttonText: "Select date",
          yearRange: "-123:+nn"
      });
  });
  </code></pre>
  
  <p>And HTML </p>
  
  <pre><code>&lt;label&gt;DOB:&lt;/label&gt;&lt;input id="datepicker" data-bind="textInput: birthdate"&gt;
  </code></pre>
  
  <p>Working example here <a href="http://ouyanews.us/FFtest.html" rel="nofollow noreferrer">http://ouyanews.us/FFtest.html</a> - just change FF browser window to get Suffix label into second row then it should to re-create issue.</p>
  
  <p>Any clue what can be wrong?</p>