Use polkit (pkexec) instead of consolehelper, thanks to Gene Czarcinski (#1145813)
Gracefully handle exception messages of all types (#1044309)
Gracefully handle missing paths (#1057640)
More robust handling of exception messages (#1098725)

This should hopefully fix a lot of random unicode errors in our exception
message handling.
Ensure our destination path exists before checking for the liveos (#1006270)
Version bump
Merge branch 'release/3.13.1' into develop