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
}
	protected static Command pasteParameterGroup( String commandType,
			Object childGroup, ParameterGroupHandle targetGroup )
	{
		CompoundCommand commands = new CompoundCommand( );
		ParameterGroupHandle childHandle = null;
		if ( childGroup instanceof ParameterGroupHandle )
		{
			childHandle = (ParameterGroupHandle) childGroup;
		}
		else if ( DEUtil.isParameterGroup( childGroup ) )
		{
			childHandle = (ParameterGroupHandle) ( (IDesignElement) childGroup ).getHandle( SessionHandleAdapter.getInstance( )
					.getReportDesignHandle( )
					.getModule( ) );
		}
		if ( childHandle != null )
		{
			SlotHandle transferSlot = childHandle.getParameters( );
			for ( Iterator i = transferSlot.iterator( ); i.hasNext( ); )
			{
				commands.add( getNewCommand( commandType,
						i.next( ),
						targetGroup,
						-1 ) );
			}
		}
		return commands;
	}
	protected static Object transferSlotHandle( String commandType,