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
Group propertiesSection = new Group( composite, SWT.NONE );
		propertiesSection.setText( GROUP_PROPERTIES );
		propertiesSection.setLayout( new GridLayout( 2, false ) );
		propertiesSection.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );
		createLabel( propertiesSection, LABEL_NAME );
		nameEditor = new Text( propertiesSection, SWT.BORDER );
		nameEditor.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );
		nameEditor.addModifyListener( new ModifyListener( ) {
			public void modifyText( ModifyEvent e )
			{
				updateMessageLine( );
			}
		} );
		createLabel( propertiesSection, LABEL_PROMPT_TEXT );
		promptTextEditor = new Text( propertiesSection, SWT.BORDER );
		promptTextEditor.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );
		createLabel( propertiesSection, LABEL_PARAM_DATA_TYPE );
		dataTypeChooser = new Combo( propertiesSection, SWT.READ_ONLY
				| SWT.DROP_DOWN );
		dataTypeChooser.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );
		dataTypeChooser.setItems( ChoiceSetFactory.getDisplayNamefromChoiceSet( DATA_TYPE_CHOICE_SET ) );
		dataTypeChooser.addSelectionListener( new SelectionAdapter( ) {
			public void widgetSelected( SelectionEvent e )
			{
				changeDataType( );
				updateCheckBoxArea( );
			}
		} );
		createLabel( propertiesSection, LABEL_DISPALY_TYPE );
		controlTypeChooser = new Combo( propertiesSection, SWT.READ_ONLY