Undo button for actions in the admin panel

[#1]

Today I wanted to edit a user group in SiteCatalyst but accidentally clicked on 'Delete' instead of 'Edit'. It seems that there's no way to undo this action. It would be good if the confirmation message "Group successfully deleted." was extended to "Group successfully deleted. Click here to undo this action." 

It is a good usability practice to allow users to undo their actions, especially that in this case 'Edit' and 'Delete' buttons are so small and so close to each other.