fix metatypes not registered for showguimessage invocation

src/librssguard/miscellaneous/application.h

@@ -52,6 +52,7 @@ struct ITaskbarList4;
 
 struct GuiMessage {
   public:
+    GuiMessage() {}
     GuiMessage(QString title, QString message, QSystemTrayIcon::MessageIcon type)
       : m_title(std::move(title)), m_message(std::move(message)), m_type(type) {}
 
@@ -64,6 +65,7 @@ Q_DECLARE_METATYPE(GuiMessage)
 
 struct GuiMessageDestination {
   public:
+    GuiMessageDestination() {}
     GuiMessageDestination(bool tray = true, bool message_box = false, bool status_bar = false)
       : m_tray(tray), m_messageBox(message_box), m_statusBar(status_bar) {}
 
@@ -76,6 +78,7 @@ Q_DECLARE_METATYPE(GuiMessageDestination)
 
 struct GuiAction {
   public:
+    GuiAction() {}
     GuiAction(QString title = {}, const std::function<void()>& action = nullptr)
       : m_title(std::move(title)), m_action(action) {}
 

src/librssguard/miscellaneous/notification.cpp

@@ -148,7 +148,7 @@ QString Notification::nameForEvent(Notification::Event event) {
       return QObject::tr("Node.js - package(s) updated");
 
     case Notification::Event::NodePackageFailedToUpdate:
-      return QObject::tr("Node.js - package(s) failed to updated");
+      return QObject::tr("Node.js - package(s) failed to update");
 
     default:
       return QObject::tr("Unknown event");