* [#1151] Background syncing
- A periodic background block synchronization has been added. When the device is connected to the internet using an unmetered connection and is plugged into the power, the background task will start to synchronize blocks randomly between 3 and 4 a.m.
- The background worker was in place but not fully working, plus was set to trigger randomly in 24 hours
- Changelog update
- Closes#1151
- Closes#634
- Its follow-up #1249
- Its follow-up #1258
Honza Rychnovský
Carter Jernigan