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
targetObj,
					position,
					commandName,
					commandType,
					commands );
			commands.execute( );
			stack.commit( );
		}
		catch ( Exception e )
		{
			stack.rollbackAll( );
			return false;
		}
		return true;
	}
	protected static void addCommandToCompound( Object transferData,
			Object targetObj, int position, String commandName,
			String commandType, CompoundCommand commands )
	{
		if ( transferData instanceof SlotHandle )
		{
			transferData = transferSlotHandle( commandType, transferData );
		}
		if ( transferData instanceof Object[] )
		{
			Object[] array = (Object[]) transferData;
			for ( int i = 0; i < array.length; i++ )
			{
				if ( array[i] instanceof EmbeddedImageHandle )
				{