for instance), clicking on [Search], entering a search target in the
resulting popup and clicking on [Okay] or typing <return>, the text
window got pushed underneath the main window so seemed to go away
+Qt: use idPressed signal instead of buttonPressed for recent Qt
Qt+OSX: fix control key (fixed all except for ^V); handle ^V as a shortcut key
Qt+OSX: rename menu entry "nethack->Preferences..." for invoking nethack's
'O' command to "Game->Run-time options" and entry "Game->Qt settings"