[Qt] small notificator and style changes

- remove default arguments for notificator
- re-order some calls to use same ordering in Qt files
- style police changes (spaces, comments and such)

src/qt/bitcoingui.cpp

@@ -405,7 +405,7 @@ void BitcoinGUI::createTrayIcon(bool fIsTestnet)
     trayIcon->show();
 #endif
 
-    notificator = new Notificator(QApplication::applicationName(), trayIcon);
+    notificator = new Notificator(QApplication::applicationName(), trayIcon, this);
 }
 
 void BitcoinGUI::createTrayIconMenu()