Improved contrast for light and dark theme interfaces

[nielsdejong]

While testing out 2.3.2, found some places where we can improve contract between lines/borders/background to make the UI a bit nicer.

Also did some Needle styling fixes on the actions / rule-based styling modals.

[codecov]

Codecov Report

Patch coverage: 57.89% and project coverage change: +0.03% 🎉

Comparison is base (e12e49c) 47.00% compared to head (9994e7a) 47.03%.
Report is 9 commits behind head on develop.

❗ Current head 9994e7a differs from pull request most recent head 58dd726. Consider uploading reports for the commit 58dd726 to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #566      +/-   ##
===========================================
+ Coverage    47.00%   47.03%   +0.03%     
===========================================
  Files          176      176              
  Lines         6857     6861       +4     
  Branches      2107     2107              
===========================================
+ Hits          3223     3227       +4     
  Misses        3593     3593              
  Partials        41       41              

Files Changed	Coverage Δ
src/chart/Utils.ts	10.00% <ø> (ø)
src/chart/pie/PieChart.tsx	86.07% <ø> (ø)
src/chart/table/TableChart.tsx	63.00% <ø> (ø)
src/component/editor/CodeViewerComponent.tsx	100.00% <ø> (ø)
src/dashboard/header/DashboardHeader.tsx	75.00% <ø> (ø)
...ncedcharts/chart/choropleth/ChoroplethMapChart.tsx	2.43% <ø> (ø)
...tensions/advancedcharts/chart/radar/RadarChart.tsx	1.72% <ø> (ø)
...nsions/advancedcharts/chart/sankey/SankeyChart.tsx	76.76% <ø> (ø)
src/report/Report.tsx	59.84% <ø> (ø)
src/chart/parameter/ParameterSelectionChart.tsx	71.42% <42.85%> (+2.67%)	⬆️
... and 4 more

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[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
3 Code Smells

No Coverage information
0.0% Duplication