Bug 151361 default value for reousrce folder user preference
When user does not sepecify the resourec foler user preference, can we make the current project folder (in IDE) or the current report design file's folder (in RCP) as the default value for the resource folder. This way, by default the current project folder is the resource folder where user can create their libs and images. Also please set the default user preference to be null when BIRT is freshly installed.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ImageBuilder.java
private static final String DLG_SELECT_PICTURE_LABEL = Messages.getString( "ImageBuilder.Label.SelectFrom" ); 
	private static final String DLG_INSERT_BUTTON_MSG = Messages.getString( "ImageBuilder.Button.Insert" ); 
	public static final String DLG_TITLE_NEW = Messages.getString( "ImageBuilder.DialogTitle.New" ); 
	public static final String DLG_TITLE_EDIT = Messages.getString( "ImageBuilder.DialogTitle.Edit" ); 
	
	
	
	private static final String DLG_TITLE_IMPORT_FAIL = Messages.getString( "ImageBuilder.DialogTitle.ImportFailed" ); 
	private static final String DLG_TITLE_LOADING_FAIL = Messages.getString( "ImageBuilder.DialogTitle.LoadingFailed" ); 
	private static final String DLG_ERROR_MSG_LOADING_FAIL = Messages.getString( "ImageBuilder.ErrorMessage.LoadingFailed" ); 
	private static final String DLG_ERROR_MSG_FILE_EXISTS = Messages.getString( "ImageBuilder.ErrorMessage.FileLoaded" ); 
	private ImageHandle inputImage;
	private Button embedded, uri, previewButton, dynamic, bindingButton;
	private Button resource;
	private Composite inputArea;
	private ImageCanvas previewCanvas;
	private Text uriEditor;
	private List embeddedImageList;
	final private static int URI_TYPE = 0;
	final private static int EMBEDDED_TYPE = 1;
	final private static int BLOB_TYPE = 2;
	final private static int FILE_TYPE = 3;
	private int selectedType = -1;
	private java.util.List dataSetList = new ArrayList( );
	private java.util.List inputDataSetList = new ArrayList( );
	/**
	 * The constructor.
	 * 
	 * @param parentShell
	 */