magit-insert-wazzup-head-line: restore old name

Give another rebase victim its old name back.
magit-insert-wazzup-branches: restore old name

Give another rebase victim its old name back.
magit-insert-wazzup-commits: use magit-format-ref-label correctly

The latter has been sanitized earlier, but
the former hasn't been adapted accordingly, until now.
magit-bind-match-strings: use match-string-no-properties
magit-bind-match-strings: add to font-lock keywords
magit-wash-diffstat: use magit-bind-match-strings
Makefile: clean quietly
Revert "magit-bind-match-strings: use match-string-no-properties"

This reverts commit 0cb877f2cd813b853d13c884b421ae98026d1623.