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
if (message.equals(newMessage) && messageImage == newImage)
			return;
		message = newMessage;
		if (message == null)
			message = ""; 
		messageImage = newImage;
		if (!showingError) {
			
			messageLabel.setText(message);
			messageLabel.setImage(messageImage);
			messageLabel.setToolTipText(message);
		}
	}
	/**
	 * Shows the preference page corresponding to the given preference node.
	 * Does nothing if that page is already current.
	 *
	 * @param node the preference node, or <code>null</code> if none
	 * @return <code>true</code> if the page flip was successful, and
	 * <code>false</code> is unsuccessful
	 */
	protected boolean showPage(IPreferenceNode node) {
		if (node == null)
			return false;
		
		if (node.getPage() == null)
			node.createPage();
		if (node.getPage() == null)
			return false;