As a follow up of #533 and also detected during #538 #524 tasks, fixed 2 more issues/bugs

* only call this->abandonAndWait() when not in main thread (also slack discussion MS/KB)
* make sure web data service start to read even if setup reader signal was missed
* add timestamp to setupreader to detect "recently read" in case signal is missed

src/blackmisc/threadedreader.cpp

@@ -8,6 +8,7 @@
  */
 
 #include "threadedreader.h"
+#include "blackmisc/threadutils.h"
 
 using namespace BlackMisc;
 using namespace BlackMisc::Network;
@@ -48,6 +49,14 @@ namespace BlackMisc
         this->m_updateTimestamp = updateTimestamp;
     }
 
+    bool CThreadedReader::updatedWithinLastMs(qint64 timeLastMs)
+    {
+        QDateTime dt(getUpdateTimestamp());
+        if (dt.isNull() || !dt.isValid()) { return false; }
+        qint64 delta = QDateTime::currentMSecsSinceEpoch() - dt.toMSecsSinceEpoch();
+        return delta <= timeLastMs;
+    }
+
     void CThreadedReader::requestReload()
     {
         // default implementation, subclasses shall override as required
@@ -56,11 +65,16 @@ namespace BlackMisc
 
     void CThreadedReader::gracefulShutdown()
     {
-        this->abandonAndWait();
+        // if not in main thread stop, otherwise it makes no sense to abandon
+        if (!CThreadUtils::isCurrentThreadObjectThread(this))
+        {
+            this->abandonAndWait();
+        }
     }
 
     CThreadedReader::~CThreadedReader()
     {
+        gracefulShutdown();
     }
 
     void CThreadedReader::setInterval(int updatePeriodMs)

src/blackmisc/threadedreader.h

@@ -30,21 +30,25 @@ namespace BlackMisc
     class BLACKMISC_EXPORT CThreadedReader : public CContinuousWorker
     {
     public:
+        //! Destructor
+        virtual ~CThreadedReader();
+
         //! Thread safe, set update timestamp
         //! \threadsafe
         QDateTime getUpdateTimestamp() const;
 
         //! Thread safe, set update timestamp
         //! \threadsafe
-        void setUpdateTimestamp(const QDateTime &updateTimestamp);
+        void setUpdateTimestamp(const QDateTime &updateTimestamp = QDateTime::currentDateTimeUtc());
+
+        //! Was setup read within last xx milliseconds
+        //! \threadsafe
+        bool updatedWithinLastMs(qint64 timeLastMs);
 
         //! Request new reading
         //! \note override as required, default is to call initialize()
         virtual void requestReload();
 
-        //! Destructor
-        virtual ~CThreadedReader();
-
         //! Set the update time
         //! \param updatePeriodMs <=0 stops the timer
         //! \threadsafe