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/PubSub.h

@@ -43,7 +43,7 @@ public:
         }
 
         // Wait for Mutex usage
-        if (mutex.lock(kernel::MAX_TICKS)) {
+        if (mutex.lock(kernel::FREERTOS_MAX_TICKS)) {
             // TODO: Fix the case where the mutex might be immediately locked after this point and then crashes when deleted
             mutex.unlock();
         }