Issue title: Issue with Flexslider and iPad
 Issue body: Flexslider seems to work on all browsers on my desktop but doesn't work on my iPad.  I am using the very latest version (2.2.2).  

The issue can be seen at http://www.maineflyfish.com/

Anyone have any suggestions on how to fix it?

 Comments: 
 Comment 0: Nevermind, it was a mistake on my part.

{'source': 'GithubIssues', 'repo_name_with_owner': 'woocommerce/FlexSlider', 'issue_id': 30354549, 'repo_stars': 4937.0}