Defaults to false
Since 3.2, Ghosting can be set to one of the value of {@link TDraggableGhostingOptions} enumeration.
o "True" or "Ghosting" means standard pre-3.2 ghosting mechanism
o "SuperGhosting" use the Superghosting patch by Christopher Williams, which allow elements to be dragged from an
scrollable list
o "False" or "None" means no Ghosting options
