* properly done background backup service
* new concurrency/locking management with heartbeat
fix communication erros with Kotlin plugin on start/stop service methods
better error handling for BackgroundService public methods
Add default notification message when service is running
* configurable WiFi & charging requirement for service
* use translations in background service
* Fixed app not resuming backup after closing and reopening the app
* Fixed cosmetic effect of backup button doesn't change state right away after pressing start backup
* Fixed grammar
* Fixed deep copy problem that cause incorrect asset count when backing up
* Format code
