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
previewLabel = new Label( previewArea, SWT.NONE );
		previewLabel.setAlignment( SWT.CENTER );
		previewLabel.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );
		
		createLabel( displayOptionSection, LABEL_LIST_LIMIT ); 
		Composite limitArea = new Composite( displayOptionSection, 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 )
			{
				e.doit = ( "0123456789\0\b\u007f".indexOf( e.character ) != -1 ); 
			}
		} );
		Label values = new Label( limitArea, SWT.NULL );
		values.setText( Messages.getString( "ParameterDialog.Label.values" ) ); 
		values.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );
		
		createLabel( displayOptionSection, null ); 
		Composite checkBoxArea = new Composite( displayOptionSection, SWT.NONE );
		checkBoxArea.setLayout( UIUtil.createGridLayoutWithoutMargin( 2, false ) );