1) in the autopickup exception sub-menu from 'O', change the selector for
"exit" from 'e' to 'x' so that the entries occur in alphabetical order.
Also frees up 'e' for some hypothetical future "edit" entry (I'm not
planning on attempting to implement anything along those lines though).
-1) I wanted to make 'x' start out preselected to show that it's the default
choice, but that doesn't work correctly--at least for the tty interface.
PICK_ONE menus don't know how to deal with having a preselected item and
in this case it ended up returning 'x' no matter what choice I made.
Even if that aspect gets fixed, it might have trouble with explicitly
picking the preselected entry since that would probably be toggled off
in the process. So the preselection bit of this menu is commented out.
2) at the prompt for adding new exceptions, quit adding instead of giving
"invalid syntax" warning if user enters empty input.
3) allow <ESC> in the "list" or "remove" submenu to quit all the way out of
the upper menu too.
4) simplify the way magic numbers are used for action_titles[] menu setup.
5) greatly simplify return value of special_handling().
6) avoid a potential for getlin() or strcat() buffer overflow if getlin()
were ever to be changed to return BUFSZ-1 characters instead of COLNO or
whatever its narrower current limit is.
I'm pretty sure that I've run into the issue of being unable to have a
preselected entry in a PICK_ONE menu before, but I can't recall if I ever
mentioned it. Fixing that looks like it'd be pretty messy and would need
to be done for all the interfaces. Ick.
669eec4997