Fixes open-classifieds/openclassifieds2#981 (newsletters editor usage of HTML editor not BBCODE)
open-classifieds/openclassifieds2#963 (Modal confirmation replace with something better)
#961 (CDN images)
#961 (CDN images)
Merge remote-tracking branch 'upstream/master'
Merge pull request #337 from oliverds/master

Newsletters HTML editor, Modal confirmation, CDN images