Bug 168808 Display text is lost after launching import values dialog
Steps to reproduce: 1.new a parameter; 2.select list box control type; 3.press "Import Values" button to import some values; 4.assign display texts for the imported values; 5.press "Import Values" button to launch import values dialog again; 6.press ok button on dialog; Expected result: The previous assigned display texts are remained. Actual result: The previous display texts are lost.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dialogs/ImportValueDialog.java
selectionArea.setLayout( UIUtil.createGridLayoutWithoutMargin( 2, false ) );
		selectionArea.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );
		new Label( selectionArea, SWT.NONE ).setText( LABEL_SELECT_DATASET );
		dataSetChooser = new Combo( selectionArea, SWT.DROP_DOWN
				| SWT.READ_ONLY );
		dataSetChooser.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );
		dataSetChooser.addSelectionListener( new SelectionAdapter( ) {
			public void widgetSelected( SelectionEvent e )
			{
				String newSelection = dataSetChooser.getText( );
				if ( !currentDataSetName.equals( newSelection ) )
				{
					currentDataSetName = newSelection;
					refreshColumns( );
				}
			}
		} );
		new Label( selectionArea, SWT.NONE ).setText( LABEL_SELECT_COLUMN );
		columnChooser = new Combo( selectionArea, SWT.DROP_DOWN | SWT.READ_ONLY );
		columnChooser.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );
		columnChooser.addSelectionListener( new SelectionAdapter( ) {
			public void widgetSelected( SelectionEvent e )
			{
				int newSelectedIndex = columnChooser.getSelectionIndex( );
				if ( selectedColumnIndex != newSelectedIndex )
				{
					selectedColumnIndex = newSelectedIndex;
					refreshValues( );
				}
			}