Hide `hidden` columns, unpack `hidden` attribute in V1
@ mention of reviewers`
@Didayolo`
A brief description of the purpose of the changes contained in this PR.
Now users will not see hidden columns in leaderboard
Issues this PR resolves
To test
V2 competition should be tested if hidden column is populated correctly
Checklist
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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