Bug 33488 [Preferences] [Help] F1 help should always give help about the selected page
build I20030227 - Window / Preferences - focus is in tree at left - F1 - it gives you help about the dialog, not the selected page - give the selected page focus - F1 - it gives you help about the page F1 should always give you help about the selected page. It should also give help about the dialog at the same time, if possible (e.g. a link for the page, and a link for the dialog).
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/PreferencePage.java
* 
	 * @see #createDescriptionLabel.
	 */
	private Label descriptionLabel;
	/**
	 * Caches size of page.
	 */
	private Point size = null;
	/**
	 * Creates a new preference page with an empty title and no image.
	 */
	protected PreferencePage() {
		this(""); 
	}
	/**
	 * Creates a new preference page with the given title and no image.
	 *
	 * @param title the title of this preference page
	 */
	protected PreferencePage(String title) {
		super(title);
	}
	/**
	 * Creates a new abstract preference page with the given title and image.
	 *
	 * @param title the title of this preference page
	 * @param image the image for this preference page,
	 *  or <code>null</code> if none
	 */
	protected PreferencePage(String title, ImageDescriptor image) {