1. Fixed delete label throw a exception issue.  "This request has been blocked because sensitive information could be disclosed to third party web sites when this is used in a GET request. To allow GET requests, set JsonRequestBehavior to AllowGet."

2. Fixed delete label not work in EntityFramework provider.

3. Rendering mistake on page editing.
Fixed can not delete the labels under categories.
daily build 4.4.0.0425
Merge branch 'master' of https://github.com/Kooboo/CMS