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
private Composite valueArea, sorttingArea;
	private List columnList;
	private IStructuredContentProvider contentProvider = new IStructuredContentProvider( ) {
		public void dispose( )
		{
		}
		public void inputChanged( Viewer viewer, Object oldInput,
				Object newInput )
		{
		}
		public Object[] getElements( Object inputElement )
		{
			ArrayList list = ( (ArrayList) inputElement );
			ArrayList elementsList = (ArrayList) list.clone( );
			return elementsList.toArray( );
		}
	};
	private ITableLabelProvider labelProvider = new ITableLabelProvider( ) {
		public Image getColumnImage( Object element, int columnIndex )
		{
			if ( valueTable.getColumnProperties( ).length == 4
					&& columnIndex == 1 )
			{
				SelectionChoice choice = ( (SelectionChoice) element );
				if ( isDefaultChoice( choice ) )
				{
					return DEFAULT_ICON;
				}
			}
			return null;