Accelerator keys in popup menus don't work

[Jan Rychter]

Pop-up menus display accelerator keys, but they don't seem to work. It
seems that accelerator keys only work in the main menu.

I don't know whether this is intended, but if it is, perhaps it should
be documented, and perhaps we should not display the accelerator
shortcuts (underlined letters).

I have verified that both XEmacs 21.4.15 and 21.5.17 both exhibit this
behavior. I configure them using:

  ./configure --with-mule --error-checking=none --with-menubars=lucid
  --with-scrollbars=lucid --with-dialogs=athena --with-widgets=athena
  --with-athena=3d --with-sound=no --pdump --with-ldap=no 

--J.