DENBUG-294: UI: Log export between different devices on the same USB drive has conflict of names.
- Added functionality to properly backup the BootPOST log which is the log before getting the HDSerial.
- It will get backed up if it is in the current day and system just has changed to the new log file due to receiving of the serial.
- When trying to back up the normal logs (logs with serial), will try for its BootPOST log, if exists will get backed up.