Allow LaTeX previewing for multiple prompts

Update submissions and DRF versions.

Rc/1.4.4

Added LaTeX preview feature to all comment/feedback fields

s/question/prompt in user-facing strings

Fix unable to view ORA responses (files) in leaderboard

This check is no longer valid, removing it as focus is not on the header

button

EDUCATOR-560

Fixed the "Allow LaTeX Responses" setting

Rc/1.4.3

Use lazy translation to avoid import issues

1.4.2

Expand course_id column

1.4.1

Fix broken auto_auth page

Instructor Dashboard Fixes

Fix issue with 'staff' and 'waiting' numbers being incorrect due to odd
translation. Fix CSS issue with overflow in cells for large numbers.

EDUCATOR-118, EDUCATOR-156

All files with upper case extension changes into lowercase.

Fix file upload tests

We can't easily select multiple files in acceptance tests, so don't try that.