The presence of longer lines has made the 'about' box become wider
so combine the first two short lines into one longer one.
Switching to the longer nethack version string resulted in "This
is NetHack MacOSX Nethack ..." so remove the initial "NetHack"
from the 'about' box's format string. That version string also
includes a final period; strip that off since "with Qt 5.x.y."
follows it to end the sentence.
Still some issues:
The application menu has first entry "nethack" which ought to be
capitalized but I haven't been able to figure out how to accomplish
that.
Some code in qt_main.cpp tries to add an extra instance of "about
NetHack" to the game window's "Help" menu but it doesn't show up.
b8b4fc70da