migrate to QAD v2

utils/pult/main.cpp

@@ -3,9 +3,7 @@
 
 int main(int argc, char *argv[]) {
 	QApplication a(argc, argv);
-#if QT_VERSION >= 0x050000
-	a.setAttribute(Qt::AA_UseHighDpiPixmaps, true);
-#endif
+	enableHighDPI();
 	CDPultWindow w;
 	w.show();
 	if (a.arguments().size() > 1)