Refactor freqman_db parsing (#1244)

* WIP freqman changes/memory perf/stash
* Split ui tone_key function out for testing.
* Add more tests and fix bugs.
* Use default max_entries in recond
* Set limit back to 90 for now

firmware/application/apps/soundboard_app.hpp

@@ -29,7 +29,6 @@
 #include "baseband_api.hpp"
 #include "lfsr_random.hpp"
 #include "io_wave.hpp"
-#include "tone_key.hpp"
 #include "app_settings.hpp"
 #include "radio_state.hpp"