Bug 205938 Cross Tab: 2.2.9 Measures from a cube can be dragged and dropped to left and not to right.
If user wants to show an existing measure on a cross tab that he has defined in a cube, he can only add it to the left and not to the right of an existing measure. Proposed solution User should be ale to add a measure both to the left and right of an existing measure.
xtab/org.eclipse.birt.report.item.crosstab.ui/src/org/eclipse/birt/report/item/crosstab/internal/ui/editors/editpolicies/CrosstabCellFlowLayoutEditPolicy.java
Object source = child.getModel( );
		Object afterObj = after == null ? null : after.getModel( );
		Object childParent = child.getModel( );
		if (parentObj instanceof CrosstabCellAdapter && childParent instanceof CrosstabCellAdapter)
		{
			CrosstabCellAdapter childAdapter = (CrosstabCellAdapter)childParent;
			CrosstabCellAdapter parentAdapter = (CrosstabCellAdapter)parentObj;
			if (ICrosstabCellAdapterFactory.CELL_FIRST_LEVEL_HANDLE.equals( childAdapter.getPositionType( ) )
				&& (ICrosstabCellAdapterFactory.CELL_FIRST_LEVEL_HANDLE.equals( parentAdapter.getPositionType( ) )
				|| ICrosstabCellAdapterFactory.CELL_LEVEL_HANDLE.equals( parentAdapter.getPositionType( )))
				)
			{
				if (afterObj != parentAdapter.getFirstElement( ))
				{
					afterObj = null;
				}
				if (childAdapter.getCrosstabCellHandle( ).getCrosstab( ) == parentAdapter.getCrosstabCellHandle( ).getCrosstab( ))
				{
					return new ChangeAreaCommand(parentAdapter.getDesignElementHandle( ), 
							childAdapter.getDesignElementHandle( ),(DesignElementHandle) DNDUtil.unwrapToModel( afterObj ) );
				}
				else
				{
					return UnexecutableCommand.INSTANCE;
				}
			}
			else if (ICrosstabCellAdapterFactory.CELL_MEASURE.equals( childAdapter.getPositionType( ) )
					&& ICrosstabCellAdapterFactory.CELL_MEASURE.equals( parentAdapter.getPositionType( ) ))
				{
					if (afterObj != parentAdapter.getFirstElement( ))