R1:3da38c74da21

PHUIErrorView

Summary: Clean up the error view styling.

Test Plan:
Tested as many as I could find, built additional tests in UIExamples

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Reviewers: btrahan, epriestley

Reviewed By: epriestley

Subscribers: hach-que, Korvin, epriestley

Differential Revision: https://secure.phabricator.com/D11605