R1:71d9a6be0743

Clean up error state on Dashboards

Summary: A more basic error view

Test Plan:
Made stuff up

{F165315}

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin

Maniphest Tasks: T5319

Differential Revision: https://secure.phabricator.com/D9495