Manually backport from master, commit 00e09435 and its fixes. Original author Bruno Barbieri.

src/mainwindow.h

@@ -211,6 +211,7 @@ private slots:
     void on_actionExecution_Logs_triggered(bool checked);
     void on_actionAutoExit_qBittorrent_toggled(bool );
     void on_actionAutoSuspend_system_toggled(bool );
+    void on_actionAutoHibernate_system_toggled(bool );
     void on_actionAutoShutdown_system_toggled(bool );
     // Check for active torrents and set preventing from suspend state
     void checkForActiveTorrents();