CYB-281 - Sections not displayed in Leaderboard: backlog the feature, task: remove column and filter in

https://jira.ets.berkeley.edu/jira/browse/CYB-281
Merge pull request #172 from christianv/CYB-281

CYB-281 - Sections not displayed in Leaderboard: backlog the feature, task: remove column and filter in