viewer: lighter color for hovered row

bench: unlock at (any kind of) exit Helps with running bench.py via a wrapper shell script, for example.

bench: write pid into lockfile, properly close it

bench: split long lines (parser arguments)

bench: consider --marks when also --auto

bench: mention default revset

bench: expose time()'s mintime and mintries arguments as command line options

bench: add --marks command line argument

bench: an awful typo that invalidates the whole stcp mark

docs: note about startup time