feat: add new states

coremanager.h

@@ -96,8 +96,7 @@ private:
     void binding();
     void initializeSystems();
     void callUpdateList();
-    void lostConnection();
-    void serverBlocked();
+    void showError(ErrorsEnum errorEnum);
     void checkLoginResult(ServerAuthorization *auth);
     void checkAccessType(const QString &accessType);
     void setServerVersion(StreamingVersionData *version);