Failing integration spec
Refactor RedactsNotices to work with instances

* Instances provide the needed flexibility to redact static text
* Allows us to prefer composition over inheritance
Update RedactProc to delegate to real classes
Tweak integration spec
Add/tweak buttons in Rails Admin view
WIP
Assume redact_all takes Array, reorder specs
Update custom action to be based off Base
Fix form HTML, add JS to populate hidden input
Implement RedactsNotice#redact_all
Remove uneeded spec step