Bug 40559 [Preferences] Need to make the PreferencesPage accessible
We are currently using a CLabel for the preferences page to show the title or errors. This cannot be navigated to currently and needs to be replaced by something that can take focus.
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/PreferenceDialog.java
private static int lastTreeWidth = 150;
	public static final String PREF_DLG_IMG_TITLE_ERROR = DLG_IMG_MESSAGE_ERROR; 
	/**
	 * Title area fields
	 */
	public static final String PREF_DLG_TITLE_IMG = "preference_dialog_title_image"; 
	static {
		ImageRegistry reg = JFaceResources.getImageRegistry();
		reg.put(PREF_DLG_TITLE_IMG, ImageDescriptor.createFromFile(PreferenceDialog.class, "images/pref_dialog_title.gif")); 
	}
	/**
	 * The Cancel button.
	 */
	private Button cancelButton;
	/**
	 * The current preference page, or <code>null</code> if
	 * there is none.
	 */
	private IPreferencePage currentPage;
	private String errorMessage;
	private Color errorMsgAreaBackground;
	private Image errorMsgImage;
	/**
	 * The Help button; <code>null</code> if none.
	 */
	private Button helpButton = null;
	/**
	 * Indicates whether help is available; <code>false</code> by default.'
	 *