Bug 191685 [regression]Set default value doesn't work in Report Parameter[0705]
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ParameterDialog.java
.getChoiceSet( DesignChoiceConstants.CHOICE_PARAM_CONTROL );
	private ScalarParameterHandle inputParameter;
	private boolean loading = true;
	private Text nameEditor, promptTextEditor, helpTextEditor, formatField;
	
	private Label promptMessageLine;
	
	private CLabel errorMessageLine;
	
	private Button isRequired, doNotEcho, isHidden, distinct;
	
	private Button importValue, changeDefault, changeFormat, createDataSet;
	
	private Button dynamicRadio, staticRadio;
	
	private Combo dataTypeChooser, controlTypeChooser, defaultValueChooser;
	
	private Combo dataSetChooser, columnChooser, displayTextChooser,
			sortKeyChooser, sortDirectionChooser;
	
	private Label previewLabel, sortKeyLabel, sortDirectionLabel;
	private TableViewer valueTable;
	private String lastDataType, lastControlType;
	private String formatCategroy, formatPattern;
	private String defaultValue;
	private Composite valueArea, sorttingArea;
	private List columnList;
	private IStructuredContentProvider contentProvider = new IStructuredContentProvider( ) {
		public void dispose( )
		{