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/PreferenceDialog.java
public void setMessage(String newMessage) {
		setMessage(newMessage, IMessageProvider.NONE);
	}
	/**
	 * Sets the message for this dialog with an indication of what type
	 * of message it is.
	 * <p>
	 * The valid message types are one of <code>NONE</code>, 
	 * <code>INFORMATION</code>, <code>WARNING</code>, or <code>ERROR</code>.
	 * </p>
	 * <p>
	 * Note that for backward compatibility, a message of type <code>ERROR</code> 
	 * is different than an error message (set using <code>setErrorMessage</code>). 
	 * An error message overrides the current message until the error message is 
	 * cleared. This method replaces the current message and does not affect the 
	 * error message.
	 * </p>
	 *
	 * @param newMessage the message, or <code>null</code> to clear
	 *   the message
	 * @param newType the message type
	 * @since 2.0
	 */
	public void setMessage(String newMessage, int newType) {
		Image newImage = null;
		if (newMessage != null) {
			switch (newType) {
				case IMessageProvider.NONE :
					break;
				case IMessageProvider.INFORMATION :