Bug 137315 [Dialogs] Doubleclickable area to restore dialog size is often very small
bundles/org.eclipse.jface/src/org/eclipse/jface/dialogs/Dialog.java
/**
	 * Image registry key for error image (value
	 * <code>"dialog_error_image"</code>).
	 * 
	 * @deprecated use
	 *             org.eclipse.swt.widgets.Display.getSystemImage(SWT.ICON_ERROR)
	 */
	public static final String DLG_IMG_ERROR = "dialog_error_image"; 
	/**
	 * Image registry key for info image (value <code>"dialog_info_image"</code>).
	 * 
	 * @deprecated use
	 *             org.eclipse.swt.widgets.Display.getSystemImage(SWT.ICON_INFORMATION)
	 */
	public static final String DLG_IMG_INFO = "dialog_info_imageg";