Adds option to hide fields in post decision stage

[purujitgoyal]

[codecov[bot]]

Codecov Report

Merging #1341 (b955eaa) into master (b8a55be) will decrease coverage by 0.00%. The diff coverage is 63.63%.

@@            Coverage Diff             @@
##           master    #1341      +/-   ##
==========================================
- Coverage   72.31%   72.30%   -0.01%     
==========================================
  Files          26       26              
  Lines        8271     8279       +8     
  Branches     1481     1484       +3     
==========================================
+ Hits         5981     5986       +5     
- Misses       1917     1918       +1     
- Partials      373      375       +2     

Impacted Files	Coverage Δ
openreview/venue_request/venue_request.py	96.20% <ø> (ø)
openreview/conference/builder.py	80.07% <60.00%> (-0.09%)	:arrow_down:
openreview/conference/helpers.py	50.46% <100.00%> (+0.15%)	:arrow_up:

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[melisabok]

hide_fields was already added to the revision invitation