Significantly improved adsb demod

Change preamble detection, reduce cpu load

firmware/application/apps/ui_adsb_rx.hpp

@@ -167,6 +167,8 @@ public:
 	void update(const AircraftRecentEntry& entry);
 	
 	std::string title() const override { return "Details"; };
+
+	AircraftRecentEntry get_current_entry() { return entry_copy; }
 	
 private:
 	AircraftRecentEntry entry_copy { 0 };