make the frontend resume when an sdr device becomes present

owrx/connection.py

@@ -325,6 +325,7 @@ class OpenWebRxReceiverClient(OpenWebRxClient, SdrSourceEventClient):
         self.sdr.addSpectrumClient(self)
 
     def handleNoSdrsAvailable(self):
+        self.stack.removeLayerByPriority(0)
         self.write_sdr_error("No SDR Devices available")
 
     def startDsp(self):

owrx/property/__init__.py

@@ -294,6 +294,11 @@ class PropertyStack(PropertyManager):
 
         return changes
 
+    def removeLayerByPriority(self, priority):
+        for layer in self.layers:
+            if layer["priority"] == priority:
+                self.removeLayer(layer["props"])
+
     def removeLayer(self, pm: PropertyManager):
         for layer in self.layers:
             if layer["props"] == pm: