Ref T270, "about to shutdown" in CApplication

src/blackcore/application.cpp

@@ -963,6 +963,9 @@ namespace BlackCore
         if (m_shutdownInProgress) { return; }
         m_shutdownInProgress = true;
 
+        // info that we will shutdown
+        emit this->aboutToShutdown();
+
         // before marked as shutdown, otherwise URL
         if (m_networkWatchDog)
         {

src/blackcore/application.h

@@ -500,6 +500,9 @@ namespace BlackCore
         //! DB accessibility changed
         void changedSwiftDbAccessibility(bool accessible, const BlackMisc::Network::CUrl &testedUrl);
 
+        //! About to shutdown
+        void aboutToShutdown();
+
     protected:
         //! Setup read/synchronized
         void setupHandlingIsCompleted(bool available);