Thanks, I've tried this patch on top of Emacs master and it seems to
work well. One small suggestion is to consider giving the project name
in the mode line a dedicated face, so people/themes could customize its
appearance. (By default, it could just inherit from `default`.)
Thanks for suggestion, will do on the second round after pushing the
initial version.
I'm not yet sure whether better to add a new face or a new variable like
grep-hit-face and xref-num-matches-face that refers to the existing face.
Then it would be possible to set such variable e.g. to the face `vc-state-base`
that inherits from `default`.
Personally I think a variable pointing to a face name is a somewhat
redundant indirection, since customizing the face to inherit from some
other face is just as easy as customizing the variable to point to a
different face. But either way works, of course.