Bug 148626 [Regression]Can't fetch value from the filter of table/chart which inherites data from container
Steps: 1. create a table and bind a dataset in it 2. create another table/chart in the table detail/table group header 3. switch to the Filter tab in property editor 4. create a filter and select value in "<select value...>" combo 5. an error popuped up, "The expression value can't be retrieved"
chart/org.eclipse.birt.chart.reportitem.ui/src/org/eclipse/birt/chart/reportitem/ui/ReportDataServiceProvider.java
ChartHelpContextIds.DIALOG_NEW_DATA_SET );
		action.run( );
		return Window.OK;
	}
	protected int invokeEditFilter( )
	{
		ExtendedItemFilterDialog page = new ExtendedItemFilterDialog( itemHandle,
				this );
		return page.open( );
	}
	protected int invokeEditParameter( )
	{
		ReportItemParametersDialog page = new ReportItemParametersDialog( itemHandle );
		return page.open( );
	}
	protected int invokeDataBinding( )
	{
		Shell shell = new Shell( Display.getDefault( ), SWT.DIALOG_TRIM
				| SWT.RESIZE | SWT.APPLICATION_MODAL );
		ChartUIUtil.bindHelp( shell,
				ChartHelpContextIds.DIALOG_DATA_SET_COLUMN_BINDING );
		ColumnBindingDialog page = new ColumnBindingDialog( shell, false ) {
			protected void addBinding( ComputedColumn column )
			{
				try
				{
					DEUtil.addColumn( itemHandle, column, true );
				}
				catch ( SemanticException e )
				{