Add last update date and user to password window

[GoogleCodeExporter]

What is the expected output? What do you see instead?
1. View/Edit password, add a read-only label to the screen showing the 
date/time and user who last updated the current password value to that screen.  
Helpful in easily determining password's "age" without viewing the password 
history screen and generating an access audit event.

Original issue reported on code.google.com by joshdrum...@gmail.com on 29 Dec 2010 at 9:38