addremove: add "ui." prefix to message color keys I don't like fully-colorized status/warning messages, and I want to disable them at all. If we'd supported a syntax like 'color.ui.*=none', I could easily turn addremove.added/removed off as well as ui.error. This patch is just for that. Since addremove colors aren't released yet, which were added at ddc1da134772, there are no compatibility concerns.

update: clarify update() call sites by specifying argument names merge.update() takes a lot of parameters and I get confused all the time which is which. Differential Revision: https://phab.mercurial-scm.org/D5153