refs #787, MS review items + discussion on slack

https://dev.vatsim-germany.org/issues/787#note-4

src/blackcore/application.cpp

@@ -515,12 +515,9 @@ namespace BlackCore
 
     void CApplication::processEventsFor(int milliseconds)
     {
-        const QTime end = QTime::currentTime().addMSecs(milliseconds);
-        while (QTime::currentTime() <= end)
-        {
-            QCoreApplication::processEvents();
-            QThread::msleep(100);
-        }
+        QEventLoop eventLoop;
+        QTimer::singleShot(milliseconds, &eventLoop, &QEventLoop::quit);
+        eventLoop.exec();
     }
 
     bool CApplication::useContexts(const CCoreFacadeConfig &coreConfig)

src/blackcore/db/databasereader.cpp

@@ -148,7 +148,7 @@ namespace BlackCore
                     // Using timer to first finish this function, then the resulting signal
                     if (validInCacheEntities != CEntityFlags::NoEntity)
                     {
-                        QTimer::singleShot(10, this, [ = ]
+                        QTimer::singleShot(0, this, [ = ]
                         {
                             emit this->dataRead(validInCacheEntities, CEntityFlags::ReadFinished, 0);
                         });

src/blackcore/webdataservices.h

@@ -291,11 +291,11 @@ namespace BlackCore
         BlackMisc::CCountry getCountryForName(const QString &name) const;
 
         //! Get airports
-        //! \\threadsafe
+        //! \threadsafe
         BlackMisc::Aviation::CAirportList getAirports() const;
 
         //! Get airports count
-        //! \\threadsafe
+        //! \threadsafe
         int getAirportsCount() const;
 
         //! Get METARs