Bug 33628 [Preferences] provide API for showing a specified preference page
There is no way for a plugin to open the (workbench) preference dialog with a certain peference page selected. Enabling this would allow plugins to refer the user to a certain preference page, for example when a misconfiguration is detected during execution of an action. Also this enables developers to write a new search panel to find a text in the preference pages and get the user right there. A method select(IPreferencePage page), select(IPreferenceNode node) or select(String path) in org.eclipse.jface.preference.PreferenceDialog would help.
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/PreferenceDialog.java
*/
	private boolean showingError = false;
	/**
	 * Preference store, initially <code>null</code> meaning none.
	 * 
	 * @see #setPreferenceStore
	 */
	private IPreferenceStore preferenceStore;
	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 parentShell
	 *            the parent shell
	 * @param manager
	 *            the preference manager
	 */
	public PreferenceDialog(Shell parentShell, PreferenceManager manager) {
		super(parentShell);
		setShellStyle(getShellStyle() | SWT.RESIZE | SWT.MAX);
		preferenceManager = manager;
	}
	/*