Give Config the "✨" (SPARKLE LIKE NEW) emoji instead of "☺" (STUPID LOOKING FACE)

Summary: Fixes T13171. Open to suggestions but that face looks real, real dumb on High Sierra.

Test Plan: Visited Config, saw a serious professional emoji in the page title.

Reviewers: amckinley

Reviewed By: amckinley

Maniphest Tasks: T13171

Differential Revision: https://secure.phabricator.com/D19530