title: Cannot create hyperlink in Sitecore 8.1
body: <p>As stated in the subject I am having an issue with Sitecore 8.1
  The thing is that when I go to an item in the CMS and try to create a hyperlink in the rich-text-editor I got this select item hanging. It is showing like 'loading' but it goes infinitely - never stops. 
  Could someone help me?</p>