User datasets, general styling and layouts, getting query started, and various filtering and sorting

[thinknoack]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 92.85714% with 32 lines in your changes missing coverage. Please review.

Project coverage is 47.41%. Comparing base (b85d755) to head (ca6c9e8).
Report is 43 commits behind head on master.

Files with missing lines	Patch %	Lines
.../scripts/users/components/user-dataset-filters.tsx	86.62%	21 Missing ⚠️
...s/openneuro-app/src/scripts/users/dataset-card.tsx	94.21%	7 Missing ⚠️
.../openneuro-app/src/scripts/utils/user-datasets.tsx	93.33%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3279      +/-   ##
==========================================
+ Coverage   47.02%   47.41%   +0.38%     
==========================================
  Files         583      587       +4     
  Lines       36945    37276     +331     
  Branches     1174     1243      +69     
==========================================
+ Hits        17372    17673     +301     
- Misses      19386    19416      +30     
  Partials      187      187              

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[nellh]

Looks good so far, I added a few comments with some suggestions.

[thinknoack]

@nellh I would love to request another review. I think this is good except for the query for user datasets. I have some questions about that.