My Submission tab: Final and Provision columns should be under the 'Score' title

Describe the bug Final and Provision columns should be under the 'Score' title, like in the design. At present, Provision and Time columns are present under the 'Score' title.

To Reproduce Steps to reproduce the behavior:

1. Build the https://github.com/topcoder-platform/community-app/tree/feature-mm-submissions locally for production mode
2. go to challenge http://localhost:3000/challenges/30094385?tab=my_submissions
3. Check the score title is not aligned center above final and provision as shown in design https://marvelapp.com/cch42ib/screen/61330572

Expected behavior Score should be aligned horizontally center between Final and Provision sub header.

Screenshots https://user-images.githubusercontent.com/5114190/72375646-763fb300-3732-11ea-952c-5ec7e431d347.png

Branch to use

feature-mm-submissions

** Submission ** Submit PR against above branch. make sure lint and tests are passing.

Final Submission Guidelines

Git issue link: https://github.com/topcoder-platform/community-app/issues/3583