@bender-tags: notification, bug, 4.5.0
@bender-ui: collapsed
@bender-ckeditor-plugins: wysiwygarea, toolbar, notificationaggregator

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1. Click "Init aggregator" button.
1. Expected status after 2 seconds: "1 of 2... 50%".
1. Expected status after 4 seconds: "1 of 1... 100%".
