refs https://github.com/TryGhost/Ghost/issues/8032
- `fileStorage: false` config is going away, it predates storage engines and will simplify future image optimisation work
- simplifies UI, it can be brought back in the future in a more robust fashion if required
no issue
- switch `jscs` and `jshint` inline config to `eslint` config
- fix eslint errors, predominantly in tests where the config now the main app config more closely
refs #6640
- add `NotFoundError` to ajax service and test against that when catching errors in `gh-profile-image`
- don't use `passthrough` in Mirage for gravatar requests to avoid network calls during testing
- add additional tests for `gh-profile-image` and put the debounced gravatar test back in place
Closes#5882
* If a gravatar image is available, remove the default image behind it
* If gravatar image is not available, keep or replace the default image
no issue
- add ember-suave dependency
- upgrade grunt-jscs dependency
- add a new .jscsrc for the client's tests directory that extends from client's base .jscsrc
- separate client tests in Gruntfile jscs task so they pick up the test's .jscsrc
- standardize es6 usage across client
