in the list of changes, "add file" and "add dir"
type changes now show the size of the file to be
copied or the sum of the directory content sizes.
changes are now sorted from largest to smallest
progress bar now shows the smaller and larger
progress of change-count or transferred size,
where the larger progress is before the '>'
and the smaller one is on the last '=' before
the '-'s start (which indicate larger-not-smaller)
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