[PATCH 07 of 10 shelve-ext v3] shelve: migrate config overrides to ui.configoverride

[Sean Farley]

Kostia Balytskyi <ikostia at fb.com> writes:

> # HG changeset patch
> # User Kostia Balytskyi <ikostia at fb.com>
> # Date 1484740179 28800
> #      Wed Jan 18 03:49:39 2017 -0800
> # Node ID abdf9565fdce15604ea4abf013cb7c98a11f70ca
> # Parent  149fc6d767ce3502528b43b0e209eb411dd6e842
> shelve: migrate config overrides to ui.configoverride
>
> This patch also makes ui.quiet manipulations much more explicit
> and readable, addressing previous Yuya's concerns.

This is a good refactor :-D