.arcconfig

progress: change _updatebar() to take parameters as arguments

I want to move updatebar() back to ui. See the next patch for why.

{
    "conduit_uri": "https://phab.mercurial-scm.org/api",
    "repository.callsign": "HG",
    "arc.land.onto.default": "@",
    "base": "hg:.^"
}