Notifications do not auto-dismiss

[brianhogg]

Reproduction Steps

1. Create a notification by enrolling a student in a course
2. Go to the dashboard as that student

Expected Behavior

The notification appears but dismisses after 10 seconds

Actual Behavior

The notification must be manually closed

This issue has be recreated:

• [x] Locally
• [x] On a staging site
• [x] On a production website
• [x] With only LifterLMS and a default theme