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
}
	/**
	 * Save the last known tree width.
	 * 
	 * @param width
	 *            the width.
	 */
	private void setLastTreeWidth(int width) {
		lastTreeWidth = width;
	}
	/**
	 * Sets whether a Help button is available for this dialog.
	 * <p>
	 * Clients must call this framework method before the dialog's control has
	 * been created.
	 * <p>
	 * 
	 * @param b
	 *            <code>true</code> to include a Help button, and
	 *            <code>false</code> to not include one (the default)
	 */
	public void setHelpAvailable(boolean b) {
		isHelpAvailable = b;
	}
	/**
	 * Set the message text. If the message line currently displays an error,
	 * the message is stored and will be shown after a call to clearErrorMessage
	 * <p>
	 * Shortcut for <code>setMessage(newMessage, NONE)</code>
	 * </p>