Bug 104986 Backgound image uses an absolute path
Currently Chart uses an absolute path to indicate a backgournd image, that may cause the design unusable on other environments. Expected the background image can be definded in multiple ways like in report designer. e.g. URI(absolute path), File(relative path), Embedded Image(Encoded Image Data).
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 )
	{