Bug 132821 [Dialogs] Stored Dialog location and size invalid after changing font
bundles/org.eclipse.jface/src/org/eclipse/jface/dialogs/Dialog.java
ImageRegistry reg = JFaceResources.getImageRegistry();
		reg.put(DLG_IMG_MESSAGE_INFO, ImageDescriptor.createFromFile(
				Dialog.class, "images/message_info.gif")); 
		reg.put(DLG_IMG_MESSAGE_WARNING, ImageDescriptor.createFromFile(
				Dialog.class, "images/message_warning.gif")); 
		reg.put(DLG_IMG_MESSAGE_ERROR, ImageDescriptor.createFromFile(
				Dialog.class, "images/message_error.gif")); 
	}
	/**
	 * The dialog area; <code>null</code> until dialog is layed out.
	 */
	protected Control dialogArea;
	/**
	 * The button bar; <code>null</code> until dialog is layed out.
	 */
	public Control buttonBar;
	
	/**
	 * A mouse listener that can be used to restore the default size
	 * of a dialog.  
	 * 
	 * @since 3.2
	 */
	private MouseListener restoreSizeMouseListener = new MouseAdapter() {
		public void mouseDoubleClick(MouseEvent event) {
			restoreDialogToComputedSize();
		}
	};
	/**
	 * Collection of buttons created by the <code>createButton</code> method.