Bug 136270 Group's data binding column can only be used by the group itself
If you add some data binding columns to a group, these columns can only be used by this group itself. It should has a way to make the child can use the parent group's data binding column.
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DEUtil.java
{
				return getSmallerFontSizeIntValue( handle.getContainer( ) );
			}
			else
			{
				for ( int i = 0; i < DesignerConstants.fontSizes.length - 1; i++ )
				{
					if ( fontSize.equals( DesignerConstants.fontSizes[i][0] ) )
					{
						return Integer.parseInt( DesignerConstants.fontSizes[i + 1][1] );
					}
				}
				return Integer.parseInt( DesignerConstants.fontSizes[DesignerConstants.fontSizes.length - 1][1] );
			}
		}
		else
		{
			
			String size = (String) DesignerConstants.fontMap.get( DesignChoiceConstants.FONT_SIZE_MEDIUM );
			return Integer.parseInt( size ) + 1;
		}
	}
	private static int getSmallerFontSizeIntValue( DesignElementHandle handle )
	{
		if ( !( handle instanceof ReportItemHandle ) )
		{
			if ( handle instanceof ModuleHandle )
			{
				
				String size = (String) DesignerConstants.fontMap.get( DesignChoiceConstants.FONT_SIZE_MEDIUM );