no issue
- ran [es5-getter-ember-codemod](https://github.com/rondale-sc/es5-getter-ember-codemod)
- [es5 getters RFC](https://github.com/emberjs/rfcs/blob/master/text/0281-es5-getters.md)
- updates the majority of `object.get('property')` with `object.property` with exceptions:
- `.get('nested.property')` - it's not possible to determine if this is relying on "safe" path chaining for when `nested` doesn't exist
- `.get('config.x')` and `.get('settings.x')` - both our `config` and `settings` services are proxy objects which do not support es5 getters
- this PR is not exhaustive, there are still a number of places where `.get('service.foo')` and similar could be replaced but it gets us a long way there in a quick and automated fashion
no issue
Automated tools, code generators, and editor integrations are increasingly standardising on the import style used in `ember-modules-codemod`. Our import style differed a little with regards to service/controller injection imports which meant we were starting to see inconsistent naming.
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
supersedes #6773
- update `feature` service and `gh-feature-flag` component to work synchronously rather than async
- use the application route's `afterModel` hook so that settings are loaded before first load
- override `session` service's `authenticate` method to load the settings after successful authentication before any other routes are processed
