Past Contests : Winners icon - default image is not displayed for logged in users

https://www.topcoder.com/challenges?bucket=past <img width="1440" alt="Screenshot 2020-08-12 at 11 10 16 AM" src="https://user-images.githubusercontent.com/58783823/89979053-77b36880-dc8c-11ea-9415-b36b11b79305.png"> cc @lakshmiathreya

Final Submission Guidelines

Git issue link: https://github.com/topcoder-platform/community-app/issues/4745