Bug 113938 Report is marked dirty when open/close cascading parameter dialog without doing any operation on it
description: Report is marked dirty when open/close cascading parameter dialog without doing any operation on it steps to reproduce: 1.new a cascading parameter group 2.save the reprot 3.double click the cascading parameter to bring out edit box 4.click OK to close edit box actual result: Report has been marked dirty expected result: No dirty marked for that no operations done in edit parameter dialog
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/CascadingParametersDialog.java
private static final String COLUMN_DISPLAY_TEXT_LABEL = Messages.getString( "CascadingParametersDialog.label.column.displayText" ); 
	private static final String PARAM_CONTROL_LIST = DesignChoiceConstants.PARAM_CONTROL_LIST_BOX
			+ "/List"; 
	private static final String PARAM_CONTROL_COMBO = DesignChoiceConstants.PARAM_CONTROL_LIST_BOX
			+ "/Combo"; 
	private static final String DISPLAY_NAME_CONTROL_LIST = Messages.getString( "CascadingParametersDialog.display.controlType.listBox" ); 
	private static final String DISPLAY_NAME_CONTROL_COMBO = Messages.getString( "CascadingParametersDialog.display.controlType.comboBox" ); 
	private static final double DEFAULT_PREVIEW_NUMBER = Double.parseDouble( "1234.56" ); 
	private static final String DEFAULT_PREVIEW_STRING = Messages.getString( "CascadingParametersDialog.default.preview.string" ); 
	private static final String ERROR_TITLE_INVALID_LIST_LIMIT = Messages.getString("ParameterDialog.ErrorTitle.InvalidListLimit");	 
	
	private static final String ERROR_MSG_INVALID_LIST_LIMIT = Messages.getString("ParameterDialog.ErrorMessage.InvalidListLimit"); 
	
	private Group optionsGroup;
	private Group propertiesGroup;
	private Text cascadingNameEditor;
	private Text paramNameEditor;
	private Text helpTextEditor;
	private Text defaultValueEditor;
	private Text formatField;
	private Text listLimit;
	private Text promptText;
	private Combo dataSetsCombo;
	private Combo dataTypeChooser;
	private Combo displayTypeChooser;
	private Button createDSButton;
	private Button changeFormat;
	private Label previewLable;
	private Table table;
	private TableViewer valueTable;