Bug 27408 Preference convertor also maps to font registry
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/PreferenceConverter.java
* The default-default value for point preferences
	 * (the origin, <code>(0,0)</code>).
	 */
	public static final Point POINT_DEFAULT_DEFAULT = new Point(0, 0);
	/**
	 * The default-default value for rectangle preferences
	 * (the empty rectangle <code>(0,0,0,0)</code>).
	 */
	public static final Rectangle RECTANGLE_DEFAULT_DEFAULT =
		new Rectangle(0, 0, 0, 0);
	/**
	 * The default-default value for color preferences 
	 * (black, <code>RGB(0,0,0)</code>).
	 */
	public static final RGB COLOR_DEFAULT_DEFAULT = new RGB(0, 0, 0);
	private static final String ENTRY_SEPARATOR = ";"; 
	/**
	 * The default-default value for <code>FontData</code> preferences.
	 */
	public static final FontData[] FONTDATA_ARRAY_DEFAULT_DEFAULT;
	public static final FontData FONTDATA_DEFAULT_DEFAULT;
	static {
		Shell shell = new Shell();
		FONTDATA_ARRAY_DEFAULT_DEFAULT = shell.getFont().getFontData();
		shell.dispose();
		/**
		 * The default-default value for <code>FontData</code> preferences.
		 * This is left in for compatibility purposes. It is recommended that
		 * FONTDATA_ARRAY_DEFAULT_DEFAULT is actually used.
		 */