Bug 117149 Add additional datapoint markers
I would like to propose adding additional datapoint markers. Attached is a set of markers I would like supported.
chart/org.eclipse.birt.chart.ui.extension/src/org/eclipse/birt/chart/ui/swt/composites/MarkerIconDialog.java
{
	private transient Button btnURL;
	private transient Button btnLocal;
	private transient Button btnAdd;
	private transient Button btnPreview;
	private transient Button btnRemove;
	private transient Button btnOK;
	private transient Button btnCancel;
	private Composite inputArea;
	private IconCanvas previewCanvas;
	private transient Button btnBrowse;
	final private static int URI_TYPE = 0;
	final private static int LOCAL_TYPE = 1;
	private int selectedType = -1;
	private Text uriEditor;
	private List iconList;
	private transient Shell shell;
	private transient boolean applyMarkerIcon = false;
	private transient Palette iconPalette;
	/**
	 * Constructor
	 * 
	 * @param parent
	 *            shell of LineSeriesAttributeComposite
	 * @param iconPalette
	 *            retrieved from LineSeries
	 */
	public MarkerIconDialog( Shell parent, Palette iconPalette )
	{
		super( );