Updates to server_status and monitor_queues

[ihsaan-ullah]

Improvements of #1562

@ mention of reviewers

@Didayolo

A brief description of the purpose of the changes contained in this PR.

• server_status page: conditions added to show login message to unauthenticated user
• monitor_queues page: conditions added to show login message to unauthenticated user and error message to non-super user
• server_status default qs set to none to not fetch submissions when not needed.

Issues this PR resolves

• Some updates and improvements to server_status and montior_queues.

Checklist

• [x] Code review by me
• [x] Hand tested by me
• [x] I'm proud of my work
• [x] Code review by reviewer
• [x] Hand tested by reviewer
• [x] CircleCi tests are passing
• [x] Ready to merge

[Didayolo]

@ihsaan-ullah

Looks like even superuser can't access the "Monitor Queues" page: