Thank you so much! I tried this for "Sleep" and it works as it used to before. (Haven't tried it for Shutdown, Restart, etc. but will assume it is okay.)
As to pressing Alt to get the underlining I would only comment that the letters not being underlined automatically when accessing the Start Menu via mouse is pretty much a loss of functionality for no gain whatsoever. On that basis I would suggest the improvement that the letters always be underlined irrespective of how the user accesses the Start Menu. Just a thought. There is no functional gain, only a functional loss, in the way things are setup just now.
Again, many thanks.