Convert DBUpdateWorker to Kotlin
Rewrite a bit the Update worker, use notification channel method
- Make lower update threshold
- Make another worker to check the presence of updates
Do NOT set Foreground service type
- Set lower update threshold (3 days)
Show data updating message in lines screen too
Start DB update check at first aand settings default values check in IntroActivity (Intro) too, too
Use new OnBackPressed support API with old logic (fix T1401)