Ref T121, check if Internet is accessible

* in case the internet provider is down, this is not detected
* extended test to detect if access is possible
* in case of downtime this indicated in status component

src/blackcore/db/infodatareader.cpp

@@ -95,6 +95,7 @@ namespace BlackCore
 
         void CInfoDataReader::read()
         {
+            if (!this->doWorkCheck()) { return; }
             const CUrl url(this->getInfoObjectsUrl());
             if (!url.isEmpty())
             {