Page to list all notifications

**Current Behavior**
The latest 20 notifications are shown in the navbar.

**Expected Behavior**
The navbar shows the last 10 notificatitons, and has a link to view all notifications.
There is a notifications page where a user can see their notifications in a paginated manner, 20 at a time.

Start by locating the navbar notification component and the existing notification data entry point. Trace how the current 20 notifications are loaded, then identify the route or entry point for a new notifications page. Done means the navbar shows 10 items with a link, while the page displays all notifications 20 at a time with pagination.

Written by the indexing model from the issue text.