Bug 190727 [regression]Default value issue when switch report parameter from textbox to listbox.[0705]
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ParameterDialog.java
createDefaultEditor( );
		createSortingArea( valueArea );
		createLabel( valueArea, null );
		createPromptLine( valueArea );
		listLimit.setEditable( true );
	}
	private void createSortingArea( Composite parent )
	{
		
		sorttingArea = new Composite( parent, SWT.NONE );
		GridData sorttingAreaGridData = new GridData( GridData.FILL_HORIZONTAL
				| GridData.VERTICAL_ALIGN_END );
		sorttingAreaGridData.horizontalSpan = 2;
		sorttingArea.setLayoutData( sorttingAreaGridData );
		sorttingArea.setLayout( UIUtil.createGridLayoutWithoutMargin( 1, false ) );
		Group sortGroup = new Group( sorttingArea, SWT.NONE );
		sortGroup.setText( LABEL_SORT_GROUP );
		sortGroup.setLayout( new GridLayout( 2, false ) );
		sortGroup.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );
		Composite sortKeyArea = new Composite( sortGroup, SWT.NONE );
		sortKeyArea.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );
		sortKeyArea.setLayout( new GridLayout( 2, false ) );
		
		sortKeyLabel = new Label( sortKeyArea, SWT.NONE );
		sortKeyLabel.setText( LABEL_SORT_KEY );
		sortKeyChooser = new Combo( sortKeyArea, SWT.BORDER );
		sortKeyChooser.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );
		sortKeyChooser.add( CHOICE_NONE );
		sortKeyChooser.add( CHOICE_DISPLAY_TEXT );
		sortKeyChooser.add( CHOICE_VALUE_COLUMN );