OWVolcanoPlot: general improvements, use of GeneScoring component

[JakaKokosar]

description

Separate Gene scoring into a separate component. Bug fixes.

Includes

• Code changes
• Tests
• Documentation

[codecov-io]

Codecov Report

Merging #211 into master will increase coverage by 0.73%.
The diff coverage is 61.94%.

@@            Coverage Diff             @@
##           master     #211      +/-   ##
==========================================
+ Coverage   39.42%   40.16%   +0.73%     
==========================================
  Files          56       58       +2     
  Lines        9430     9599     +169     
==========================================
+ Hits         3718     3855     +137     
- Misses       5712     5744      +32

Flag	Coverage Δ
#subtractor	40.16% <61.94%> (+0.73%)	⬆️

Impacted Files	Coverage Δ
...ngecontrib/bioinformatics/widgets/OWVolcanoPlot.py	0% <0%> (ø)	⬆️
...trib/bioinformatics/widgets/components/__init__.py	100% <100%> (ø)
...gecontrib/bioinformatics/widgets/utils/settings.py	33.33% <42.85%> (+3.1%)	⬆️
orangecontrib/bioinformatics/utils/statistics.py	48.94% <85.71%> (+0.56%)	⬆️
.../bioinformatics/widgets/components/gene_scoring.py	91.97% <91.97%> (ø)

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[JakaKokosar]

@mstrazar hi, could you please check this when and if you have the time? Thanks :)