Fix Menu::quickloadlevel not using returnmenu()

Whoops, almost forgot this one.

Now if you hit "back to levels", your position will still be kept on the
selected level.

desktop_version/src/Input.cpp

@@ -253,8 +253,7 @@ void menuactionpress()
             break;
         case 2:
             music.playef(11);
-            game.levelpage=0;
-            game.createmenu(Menu::levellist);
+            game.returnmenu();
             map.nexttowercolour();
             break;
         }