Bug 148588 Image Builder enhancement
1.Image selector should not filter *.svg 2.Support svg image type in embedded image.
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/ImageManager.java
{
		getImageRegistry( ).remove( key );
		if ( DesignerConstants.TRACING_IMAGE_MANAGER_IMAGE_REMOVE )
		{
			System.out.println( "Image Manager >> " + key + " removed" ); 
		}
	}
	/**
	 * Loads the image into the image registry by the given URI
	 * 
	 * @param uri
	 *            the URI of the image to load
	 * @return Returns the image if it loaded correctly
	 * @throws IOException
	 */
	public Image loadImage( String uri ) throws IOException
	{
		URL url = generateURL( uri );
		if ( url == null )
		{
			throw new FileNotFoundException( uri );
		}
		return loadImage( url );
	}
	private Image loadImage( URL url ) throws IOException
	{
		String key = url.toString( );
		Image image = getImageRegistry( ).get( key );
		if ( image != null )
		{