subrepo: add progress bar support to archive

archive: add support for progress extension

progress: test setting progress.width This also makes the tests readable in a 80-character terminal which is why I made the change to both tests.

tests: add filtercr.py helper for progress tests The two tests that used filtercr.py already used a slightly different version, which explains why test-convert-svn-move.t changed after switching to using $TESTDIR/filtercr.py.

test-archive: whitespace cleanup

progress: explain format strings to translators

subrepo: re-backout 2245fcd0e160, remove test 7397a53219c9 re-removed the bad fix but not the test.