Clock icon in courseware sidebar does not follow conventions for notifications

[aphilipharrell]

The clock icon in the courseware sidebar leads to a Notifications window - the clock icon is misleading and this should be replaced with something more commonly understood to represent notifications.

Suggested fix:

Replace WatchOutline with Notifications in src/courseware/course/sidebar/sidebars/notifications/NotificationIcon.jsx

[jciasenza]

@arbrandes
I assign it to myself

[jciasenza]

Hello aphilipharrell, I already made the PR

#1510

[angonz]

@crathbun428 Can you please check if this request can be implemented? We can do it if approved.