Improvements and fixes (#595)

- Fix BluetoothSettings app not updating when toggling on Bluetooth on
- Fix BluetoothSettings app crash when closing while scanning
- Fix BluetoothSettings app crash when turning BT off while scanning
- WebServer doesn't save config anymore as a side-effect of reading the config
- Add missing license headers
- Use TactilityKernel's time and delay functions instead of TactilityFreeRtos ones

TactilityFreeRtos/Include/Tactility/EventGroup.h

@@ -100,7 +100,7 @@ public:
         bool awaitAll = false,
         bool clearOnExit = true,
         uint32_t* outFlags = nullptr,
-        TickType_t timeout = kernel::MAX_TICKS
+        TickType_t timeout = kernel::FREERTOS_MAX_TICKS
     ) const {
         assert(xPortInIsrContext() == pdFALSE);