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/ui/dialogs/ParameterDialog.java
public void widgetSelected( SelectionEvent e )
			{
				popupFormatBuilder( true );
			}
		} );
		createLabel( moreOptionSection, null );
		Group previewArea = new Group( moreOptionSection, SWT.NONE );
		previewArea.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );
		previewArea.setLayout( UIUtil.createGridLayoutWithoutMargin( ) );
		previewArea.setText( LABEL_PREVIEW );
		previewLabel = new Label( previewArea, SWT.NONE );
		previewLabel.setAlignment( SWT.CENTER );
		previewLabel.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );
		
		createLabel( moreOptionSection, LABEL_LIST_LIMIT ); 
		Composite limitArea = new Composite( moreOptionSection, SWT.NULL );
		GridLayout layout = new GridLayout( 2, false );
		layout.marginWidth = 0;
		layout.marginHeight = 0;
		limitArea.setLayout( layout );
		GridData data = new GridData( GridData.FILL_HORIZONTAL );
		data.verticalSpan = 1;
		limitArea.setLayoutData( data );
		listLimit = new Text( limitArea, SWT.BORDER );
		data = new GridData( );
		data.widthHint = 80;
		listLimit.setLayoutData( data );
		listLimit.addVerifyListener( new VerifyListener( ) {
			public void verifyText( VerifyEvent e )
			{