* This means a 2x - 10x performace boost especially for the student
  and the feedback endpoint

Student names in Subscription list for reviewer

Short polling on orig Feedback

Refresh button student list

FeedbackComment visiblity indication

SubscriptionEnded page

Right side of student overview is sticky

Statistics overview

Implemented Feedback History Table incl. search

Side Note: When searching the table, should the resulting filtered arr be <= than size 10 all those submissions will be prefetched if not already present and the user is able to instantanously view the submission. NICE!

Added Tests and sticky beahvior for feedback hist

Inactive subscriptions are shown

Added subscription refresh button

Fixed jwt refresh and auto logout

Added feedback link

Visual cue of final status in student overview

Correct Student for reviewer

Changed jwt auth endpoints

`/api-token-auth/` to `/api/get-token/`
`/api-token-refresh/` to `/api/refresh-token/`

Added student list page

Added submission serializer for student list view

Bare student list view is now implemented for the reviewer
He is able to view a searchable and sortable list of all students in the left pane of the window and their submissions on the right side

Fixed /?#/ bug on login page

Added `feedback_created`/`feedback_validated` counts to TutorSerializer

Added basic tutor overview

Added student overview help card

When going to the student overview page, a help card is shown on the right side which is replaced when viewing a submission

* Added more tests for feedback view

* Now each view is included in one file that are held in the
  package views instead of using one big file

* Did the same this for serializers

* Now using ListSerializer to implement the custom behaviour

* Also refactored the feedback serializers and models and
  removed the FeedbackLine model

* The serializers are simpler now

* Renamed 'is_final' on FeedbackComment to 'visible_to_student'