Newsletters HTML editor, Modal confirmation, CDN images

- Modal confirmation replace with something better open-classifieds/openclassifieds2#963
- CDN images open-classifieds/openclassifieds2#961
- Fixes newsletters editor usage of HTML editor not BBCODE open-classifieds/openclassifieds2#981
cool!! lets work on it then. Also I will send you now api keys, doing it now, but as an example: http://cdn.open-classifieds.com/download.jpg --> custom domain, same as: https://s3.amazonaws.com/cdn.open-classifieds.com/download.jpg more info: http://carltonbale.com/how-to-alias-a-domain-name-or-sub-domain-to-amazon-s3/