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
(DesignElementHandle) transferData,
						validateContainer );
			}
			else if ( transferData instanceof ColumnBandData )
			{
				if ( targetObj instanceof ColumnHandle )
				{
					return handleValidateContainColumnPaste( (ColumnHandle) targetObj,
							(ColumnBandData) transferData,
							false ) ? CONTAIN_PARENT : CONTAIN_NO;
				}
				return CONTAIN_NO;
			}
			else if ( transferData instanceof IDesignElement )
			{
				DesignElementHandle childHandle = ( (IDesignElement) transferData ).getHandle( SessionHandleAdapter.getInstance( )
						.getReportDesignHandle( )
						.getModule( ) );
				return handleValidateTargetCanContainByContainer( targetObj,
						childHandle,
						validateContainer );
			}
			else if ( transferData instanceof SlotHandle )
			{
				SlotHandle slot = (SlotHandle) transferData;
				Object[] childHandles = slot.getContents( ).toArray( );
				return handleValidateTargetCanContainByContainer( targetObj,
						childHandles,
						validateContainer );
			}