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
* @see #setPreferenceStore
	 */
	private IPreferenceStore preferenceStore;
	private boolean showingError = false;
	private Composite titleArea;
	private Color titleAreaColor;
	private Label titleImage;
	/**
	 * The tree viewer.
	 */
	private TreeViewer treeViewer;
	/**
	 * Creates a new preference dialog under the control of the given preference 
	 * manager.
	 *
	 * @param shell the parent shell
	 * @param manager the preference manager
	 */
	public PreferenceDialog(Shell parentShell, PreferenceManager manager) {
		super(parentShell);
		setShellStyle(getShellStyle() | SWT.RESIZE | SWT.MAX);
		preferenceManager = manager;
	}
	/* (non-Javadoc)
	 * @see org.eclipse.jface.dialogs.Dialog#buttonPressed(int)
	 */
	protected void buttonPressed(int buttonId) {
		switch (buttonId) {
			case IDialogConstants.OK_ID :
				{