Bug 167542 A parameter group isn't deleted after moving it to another parameter group through DND
Drag a parameter group and drop it to another one is a "move" operation, which cuts the source and pastes to the destination. But the source one isn't deleted in such operation while the parameters in the group are all deleted.
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DNDUtil.java
columnNumber,
							true );
				}
			}
			else if ( parent instanceof GridHandle )
			{
				if ( isNew )
				{
					( (GridHandle) parent ).insertAndPasteColumn( transferData.copy( ),
							columnNumber );
				}
				else
				{
					( (GridHandle) parent ).pasteColumn( transferData.copy( ),
							columnNumber,
							true );
				}
			}
		}
		catch ( SemanticException e )
		{
			return false;
		}
		return true;
	}
	/**
	 * Operates elements. Operation type includes move or copy. Includes
	 * transaction.
	 * 
	 * @param transferData