The drag and drop in GeoFence is not working because of the JQuery version used by GeoServer. Apache Wicket 7 and the wicket-dnd use JQuery 1.11.3 but GeoServer still includes JQuery 1.2.6.
Mailing list discussion about this: http://osgeo-org.1560.x6.nabble.com/Geofence-drag-and-drop-and-JQuery-version-td5259780.html
resolved as we merged it
Thanks to both of you for sorting this out in an orderly fashion.