refs https://github.com/TryGhost/Ghost/issues/9314
* added save button for contributor
* hide tag filter & redirect to posts.index if post is published
* update editor controller test to need session service
no issue
- add eslint-plugin-ember, configure no-old-shims rule
- run `eslint --fix` on `app`, `lib`, `mirage`, and `tests` to move imports to the new module imports
- further cleanup of Ember globals usage
- remove event-dispatcher initializer now that `canDispatchToEventManager` is deprecated
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
fixes#5136
- wrap notification fetch with a user role check to remove console error
- move author transition down to local route for users/user so that there's no infinite loop
- replace all store calls to fetch the current user with the session user instead
