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[] IMAGE_TYPES = new String[]{
			".bmp",
			".jpg",
			".jpeg",
			".jpe",
			".jfif",
			".gif",
			".png",
			".tif",
			".tiff",
			".ico",
			".svg"
	};
	private static final String[] IMAGE_FILEFILTERS = new String[]{
		"*.bmp;*.jpg;*.jpeg;*.jpe;*.jfif;*.gif;*.png;*.tif;*.tiff;*.ico;*.svg"
	};
	
	
	private static final String DLG_IMPORT_BUTTON = Messages.getString( "ImageBuilder.Button.Import" ); 
	private static final String DLG_PREVIEW_LABEL = Messages.getString( "ImageBuilder.Button.Preview" ); 
	private static final String DLG_ENTER_URI_LABEL = Messages.getString( "ImageBuilder.Label.EnterUri" ); 
	
	private static final String DLG_ENTER_RESOURCE_FILE_LABEL = Messages.getString( "ImageBuilder.Label.EnterResourceFile" ); 
	private static final String DLG_EMBEDDED_IMAGE_LABEL = Messages.getString( "ImageBuilder.Label.EmbededImage" ); 
	private static final String DLG_URI_LABEL = Messages.getString( "ImageBuilder.Label.URI" );