fixing return key

When pressing return in `nano` the terminal received an `<CTRL>+J` instead of
the return key. `<CTRL>+J` justifies the text. But is (confusingly) actually
the key for a line feed as well? Terminal programming is not easy …

NCursesPtyWindow.cpp

@@ -39,7 +39,11 @@ namespace krikkel::NCursesPtyWindow
         vterm_screen_set_callbacks(pseudoTerminalScreen, &screenCallbacks, this);
 
         // the terminal is doing most of the work
+        //raw(); — cbreak might suffice
+        //noecho(); — already set
+        //nodelay(true); — @todo needs some reprogramming
         keypad(false);
+        nonl();
 
         /// @todo block all signals, this thread does not handle any
         readPtyClientThread =