* add ember-cli-content-security-policy
* only enable client side CSP when not in production - the go side handles this otherwise
* add service that handles and stores CSP violations via the securitypolicyviolation event
* update auth form component to show a specialized message when there's a CSP error
* move to computed prop for showing the CSP error message
* fix typos
* add hasSentinel to the version service
* use hasSentinel instead of features directly
* type='button' strikes again
* pass url param in tab links to ensure hrefs are updated
* 404 when the item_type is invalid for the identity route