Migrate - ROM backup 5.0.1

Jan 15, 2019

Version 2.1

# Minor errors are now suppressed, but recorded in log.
# Fix icon retention from previous backup
# Fix wrong backup duration display.
# Fixed a bug in error correction mechanism.
# Probable fix for some apps not being backed up.
# Fix for error 6 in TWRP for some locales.
# Fixed a long-standing wrong /data space calculation in TWRP.
# Migrate helper no longer uninstalls app before installing.
# Added Telegram group link!