Prevent Qt from inserting an extra entry in the Help dropdown
menu displayed in the menu bar across the top of the screen
when nethack has focus. "Search [______]" lets the user enter
a string to search for but doesn't give nethack any control
over that so we can't have it.
I haven't found a sane way to get rid of it. The insane way
of not naming any menu "Help" works. This uses "\177Help" so
that it still looks like "Help" but won't match that string.
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