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
if ( ( (EmbeddedImageHandle) array[i] ).getElementHandle( )
							.getRoot( ) instanceof LibraryHandle )
					{
						try
						{
							array[i] = StructureFactory.newEmbeddedImageFrom( (EmbeddedImageHandle) array[i],
									SessionHandleAdapter.getInstance( )
											.getReportDesignHandle( ) );
						}
						catch ( LibraryException e )
						{
						}
					}
				}
				addCommandToCompound( array[i],
						targetObj,
						position,
						commandName,
						commandType,
						commands );
				if ( position > -1 )
				{
					position++;
				}
			}
		}
		else if ( transferData instanceof DesignElementHandle
				|| transferData instanceof IDesignElement )
		{
			if (