started to refactor Application

src/singletons/NativeMessaging.hpp

@@ -1,17 +1,16 @@
 #pragma once
 
+#include "common/Singleton.hpp"
+
 #include <QThread>
 
 namespace chatterino {
-
-class NativeMessaging
+class NativeMessaging final
 {
 public:
     // fourtf: don't add this class to the application class
     NativeMessaging();
 
-    ~NativeMessaging() = delete;
-
     class ReceiverThread : public QThread
     {
     public: