App settings revamp (#1139)

* WIP AppSetting overhaul

* WIP migrating apps to new settings.

* remove settings, rename tuned => target

* formatting

* Minor fixes

* Fix hang on app load

* run formatter

* PR comment fixes

* Load modulation into receiver model in app_settings

* Run formatter

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Co-authored-by: kallanreed <kallanreed@outlook.com>

firmware/application/ui/ui_receiver.hpp

@@ -36,6 +36,7 @@
 
 namespace ui {
 
+// TODO: build in support for editing.
 class FrequencyField : public Widget {
    public:
     std::function<void(rf::Frequency)> on_change{};