Make JsonDisplay nested keys lighter

[fiskus]

Before:

After:

[codecov[bot]]

Codecov Report

Merging #3313 (f360020) into master (d3c490b) will increase coverage by 0.00%. The diff coverage is 66.66%.

@@           Coverage Diff           @@
##           master    #3313   +/-   ##
=======================================
  Coverage   35.18%   35.19%           
=======================================
  Files         674      674           
  Lines       29331    29337    +6     
  Branches     4336     4340    +4     
=======================================
+ Hits        10321    10325    +4     
- Misses      17835    17837    +2     
  Partials     1175     1175           

Flag	Coverage Δ
api-python	90.79% <ø> (ø)
catalog	8.84% <66.66%> (+0.01%)	:arrow_up:
lambda	86.05% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
catalog/app/components/JsonDisplay/JsonDisplay.js	0.00% <0.00%> (ø)
catalog/app/utils/JSONOneliner.ts	87.60% <100.00%> (+0.42%)	:arrow_up:

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[fiskus]

I think it was hard to read the one-liner, when it's not obvious which key are from the first level, and which from the second

[fiskus]

Maybe, I'll wait feedback from customer who wanted these key/values (visually separated) in packages list