Some more interesting fields for the Users page on the Django Admin Interface

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

Improved the Django Admin interface Users page a bit more to allow for filtering and show more information about the shown users

Checklist

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