Informs the drag source that the drop is finished, and that the data of the drag will no longer be required.
a flag indicating whether the drop was successful
a flag indicating whether the source should delete the original data. (This should be TRUE for a move)
the timestamp from the "drag_data_drop" signal.
See Implementation
Informs the drag source that the drop is finished, and that the data of the drag will no longer be required.