magit-log-margin-spec: give author names a bit more room
make separate packages depend on development version 2.0.50

Not that version string is actually used by anything right now,
but "1.3.0" is meaningless by now.
magit-process-filter: cosmetics
magit-section-set-hidden: cosmetics
magit-with-section: cosmetics
magit-put-face-property: cosmetics

Remove commented code.