Bug 33085 [Preferences] Last page not remembered the second time
RC1 build - Window / Preferences - select the Appearance page - OK - Window / Preferences - Appearance page is still selected - OK - Window / Preferences - Workbench is selected It should always remember the last page, even if the page isn't changed.
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/PreferenceDialog.java
private Image errorMsgImage;
	private boolean showingError = false;
	private Point lastShellSize;
	/**
	 * Preference store, initially <code>null</code> meaning none.
	 *
	 * @see #setPreferenceStore
	 */
	private IPreferenceStore preferenceStore;
	/**
	 * The current preference page, or <code>null</code> if
	 * there is none.
	 */
	private IPreferencePage currentPage;
	/**
	 * The preference manager.
	 */
	private PreferenceManager preferenceManager;
	/**
	 * The Composite in which a page is shown.
	 */
	private Composite pageContainer;
	/**
	 * The minimum page size; 400 by 400 by default.
	 *
	 * @see #setMinimumPageSize
	 */
	private Point minimumPageSize = new Point(400, 400);
	/**
	 * The OK button.