Here are some small patches I have not had time to propose before. The 
first one changes the color to blue for `button' face. This is the 
underlined face used in help.

I have suggested this before, but without sending a patch.

The second patch sets the default for `apropos-label-face' to `button' 
(above). It also adds filling of of values in the list shown by M-x 
apropos. I believe this makes the list more readable.