(Needs a libcurses fix as well).
No need to ponce about with __m_endwin (to remember we've done endwin()),
the old recovery was wrong in any case - but I've left something that
will do an explicit redraw.
Allow the 'help' text to be from a variable (and hence translated).
Fix the display of help so that the screen underneath is actually cleared.
Preserve the screen contents while displaying help - redraw is too hard.
Use endwin(); doupdate(); to do the full refresh when ^L is typed.
Move menus up the screen if they would hit the bottom with too few lines
to show an item and the scroll text (happens with big titles).
Make 'y=0' center the window vertically - use of 0 means you can't have
a menu starting on the topline, but this is unlikely to be a problem.
Make all the menu options settable from the control file, not just from
dynamic menus.
Redo menu option list part of man page.
with that menu. The help screen is scrollable for long help screens.
The char '?' accesses the help screen as a menu command. Help screen text
is specified in the menu definition file with the menu.
