Fix memleaks of QNetworkAccessManager()

Frees memory allocated
in AudioOutputPlugin::createSampleSinkPluginInstance(QString const&, DeviceAPI*) /home//sdrangel/plugins/samplesink/audiooutput/audiooutputplugin.cpp:136
in ChirpChatDemod::ChirpChatDemod(DeviceAPI*) /home/sdrangel/plugins/channelrx/demodchirpchat/chirpchatdemod.cpp:84
in FileOutput::FileOutput(DeviceAPI*) /home/sdrangel/plugins/samplesink/fileoutput/fileoutput.cpp:54
in RadioAstronomyGUI::RadioAstronomyGUI(PluginAPI*, DeviceUISet*, BasebandSampleSink*, QWidget*) /home/sdrangel/plugins/channelrx/radioastronomy/radioastronomygui.cpp:2061
in SatelliteSelectionDialog::SatelliteSelectionDialog(SatelliteTrackerSettings*, QHash<QString, SatNogsSatellite*> const&, QWidget*) /home/sdrangel/plugins/feature/satellitetracker/satelliteselectiondialog.cpp:42:24
in SatelliteTracker::SatelliteTracker(WebAPIAdapterInterface*) /home/sdrangel/plugins/feature/satellitetracker/satellitetracker.cpp:61:24

plugins/channelrx/demodchirpchat/chirpchatdemod.cpp

@@ -95,6 +95,7 @@ ChirpChatDemod::ChirpChatDemod(DeviceAPI* deviceAPI) :
 
 ChirpChatDemod::~ChirpChatDemod()
 {
+    delete m_networkManager;
     m_deviceAPI->removeChannelSinkAPI(this);
     m_deviceAPI->removeChannelSink(this);
     stop();

plugins/channelrx/radioastronomy/radioastronomygui.cpp

@@ -2297,6 +2297,7 @@ void RadioAstronomyGUI::customContextMenuRequested(QPoint pos)
 
 RadioAstronomyGUI::~RadioAstronomyGUI()
 {
+    delete m_networkManager;
     delete ui;
     delete m_calHot;
     delete m_calCold;

plugins/feature/satellitetracker/satelliteselectiondialog.cpp

@@ -71,6 +71,7 @@ SatelliteSelectionDialog::SatelliteSelectionDialog(SatelliteTrackerSettings *set
 
 SatelliteSelectionDialog::~SatelliteSelectionDialog()
 {
+    delete m_networkManager;
     delete ui;
 }
 

plugins/feature/satellitetracker/satellitetracker.cpp

@@ -73,6 +73,7 @@ SatelliteTracker::SatelliteTracker(WebAPIAdapterInterface *webAPIAdapterInterfac
 
 SatelliteTracker::~SatelliteTracker()
 {
+    delete m_networkManager;
     stop();
     qDeleteAll(m_satState);
 }

plugins/samplesink/audiooutput/audiooutput.cpp

@@ -57,6 +57,7 @@ AudioOutput::AudioOutput(DeviceAPI *deviceAPI) :
 
 AudioOutput::~AudioOutput()
 {
+	delete m_networkManager;
 	stop();
 }
 

plugins/samplesink/fileoutput/fileoutput.cpp

@@ -56,6 +56,7 @@ FileOutput::FileOutput(DeviceAPI *deviceAPI) :
 
 FileOutput::~FileOutput()
 {
+	delete m_networkManager;
 	stop();
 }