refs #5845
- Updates tag settings screen to match content screen behaviour. Each now tag has it's own route that is link-able from other areas of the app
- Updates a number of places where jQuery event handler code was not wrapped in Ember's run loop
closes#5852
- resets navigation settings controller's model when transitioning away
- fixes `locationType` config setting so acceptance tests don't mess with the URL
- configure the ephemeral session store for ember-simple-auth during tests
- adds dummy env-config meta fields so acceptance tests don't fail
- adds `ember-cli-simple-auth-testing` dependency for auth testing helpers
- adds Pretender dependency to mock API requests for acceptance tests
