Updated ckeditor to 4.4.3

Security XSS patch and problems with 9998 family of issues with Chrome / Webkit.  The 9998 issue includes WebKit inserting rogue ``<span>`` elements when editing.  This is a huge issue that was fixed in the 4.4 series.  Some 9998 family issues are outstanding, but the biggest ones are now fixed:

https://dev.ckeditor.com/ticket/9998

They can be seen the CKEditor change log under:

    [Blink/WebKit] Fixed