Various improvements (#204)

- Fixed crash in logging app when not selecting filter
- Cleanup of unused code
- Cleanup of app code

Tactility/Source/app/timedatesettings/TimeDateSettings.cpp

@@ -89,7 +89,7 @@ public:
     }
 
     void onResult(AppContext& app, Result result, std::unique_ptr<Bundle> bundle) override {
-        if (result == Result::Ok) {
+        if (result == Result::Ok && bundle != nullptr) {
             auto name = timezone::getResultName(*bundle);
             auto code = timezone::getResultCode(*bundle);
             TT_LOG_I(TAG, "Result name=%s code=%s", name.c_str(), code.c_str());