Save waterfall / spectrum settings, update session reset

src/process/SpectrumVisualProcessor.cpp

@@ -34,6 +34,10 @@ void SpectrumVisualProcessor::setFFTAverageRate(float fftAverageRate) {
     this->fft_average_rate = fftAverageRate;
 }
 
+float SpectrumVisualProcessor::getFFTAverageRate() {
+    return this->fft_average_rate;
+}
+
 void SpectrumVisualProcessor::setCenterFrequency(long long centerFreq_in) {
     centerFreq.store(centerFreq_in);
 }

src/process/SpectrumVisualProcessor.h

@@ -22,6 +22,7 @@ public:
     void setView(bool bView);
     
     void setFFTAverageRate(float fftAverageRate);
+    float getFFTAverageRate();
     
     void setCenterFrequency(long long centerFreq_in);
     long long getCenterFrequency();
@@ -82,6 +83,9 @@ public:
         this->linesPerSecond = lines;
     }
     
+    int getLinesPerSecond() {
+        return this->linesPerSecond;
+    }
 protected:
     void process() {
         while (!input->empty()) {