TA/Instructor tags checked when posting or replying - TA/Instructor tags

Tasks: 

- [ ] Have a check for a tag to display when creating a new post/reply

Acceptance Criteria:

- [ ] Testing to make sure that tag is checked for when making a new post/reply from any role
- [ ] Does not interfere with the ability to post or reply

Estimated Effort: S

Milestone: Sprint 1