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
list.add( cloneSource( array[i] ) );
				}
			}
			if ( !list.isEmpty( ) )
			{
				return list.toArray( );
			}
			for ( int i = 0; i < array.length; i++ )
			{
				
				if ( !checkContainerExists( array[i], array ) )
				{
					list.add( cloneSource( array[i] ) );
				}
			}
			return list.toArray( );
		}
		if ( source instanceof StructuredSelection )
		{
			return cloneSource( ( (StructuredSelection) source ).toArray( ) );
		}
		if ( source instanceof ColumnHandle )
		{
			try
			{
				int columnNumber = HandleAdapterFactory.getInstance( )
						.getColumnHandleAdapter( source )
						.getColumnNumber( );
				Object parent = ( (ColumnHandle) source ).getContainer( );
				if ( parent instanceof TableHandle )