closes#5903, refs #5409
- switch alert/notification component tests from unit to integration where appropriate
- rename `notifications.closeAll` to `notifications.clearAll` to better represent it's behaviour
- add concept of a "key" to alerts/notifications and ability to close only specified keys through notifications service
- close duplicate alerts/notifications before showing a new one
- specify a key for all existing alerts
- close failure alerts on successful retries
- clear all currently displayed alerts on successful sign-in
issue #5409
- change persistent/passive notification status to alert/notification
- replace showSuccess/Info/Warn/Error with showNotification/showAlert
- fix and clean up notification/alert components
No Issue
- Switches to the newer style of dependency injection.
- Instead of injection Controllers via "needs," use
Ember.inject.controller().
- Get rid of initializers that were only injecting objects
into various factories. Converts these objects into Ember.Service
objects and declaratively inject them where needed via
Ember.inject.service(). The added benefit to this is that it's no
longer a mystery where these properties/methods come from and it's
straightforward to inject them where needed.
