Indicate device selection

src/AppFrame.cpp

@@ -207,7 +207,7 @@ AppFrame::AppFrame() :
                 devName.append(" (In Use?)");
             }
 
-            menu->Append(wxID_DEVICE_ID+p, devName);
+            menu->AppendRadioItem(wxID_DEVICE_ID+p, devName)->Check(wxGetApp().getDevice() == p);
             p++;
         }
 

src/CubicSDR.cpp

@@ -200,3 +200,7 @@ void CubicSDR::setDevice(int deviceId) {
     command.llong_value = deviceId;
     threadCmdQueueSDR->push(command);
 }
+
+int CubicSDR::getDevice() {
+    return sdrThread->getDeviceId();
+}

src/CubicSDR.h

@@ -40,6 +40,7 @@ public:
 
     std::vector<SDRDeviceInfo *> *getDevices();
     void setDevice(int deviceId);
+    int getDevice();
 
     DemodulatorThreadOutputQueue* getAudioVisualQueue();
     DemodulatorThreadInputQueue* getIQVisualQueue();