Fix display of severity level change alert condition

[swaterkamp]

What:
Show the correct direction of severity change in the condition column of alerts.

Why:
The logic behind selecting the correct value was incorrect. It was impossible to get "Severity level changed" and instead we always got "Severity level increased"

How:
I created 3 alerts, one for each condition, and visually checked whether the correct value was displayed. After editing those alerts the conditions were correctly updated. The alerts were created by sending the correct parameters to gvmd, so it was really just a displaying error.

Checklist:

• [N/A] Tests
• CHANGELOG Entry

[codecov]

Codecov Report

Merging #2623 (66a1f7b) into gsa-20.08 (073d2d2) will increase coverage by 0.30%.
The diff coverage is 74.26%.

@@              Coverage Diff              @@
##           gsa-20.08    #2623      +/-   ##
=============================================
+ Coverage      52.76%   53.06%   +0.30%     
=============================================
  Files           1070     1072       +2     
  Lines          25789    25900     +111     
  Branches        7312     7372      +60     
=============================================
+ Hits           13607    13744     +137     
+ Misses         11058    11034      -24     
+ Partials        1124     1122       -2     

Impacted Files	Coverage Δ
gsa/src/gmp/commands/wizard.js	9.23% <0.00%> (ø)
gsa/src/gmp/models/tlscertificate.js	100.00% <ø> (ø)
gsa/src/web/components/error/errorpanel.js	100.00% <ø> (ø)
gsa/src/web/pages/alerts/condition.js	3.22% <0.00%> (ø)
gsa/src/web/pages/alerts/dialog.js	20.33% <0.00%> (ø)
.../web/pages/alerts/filtercountleastconditionpart.js	60.00% <ø> (ø)
gsa/src/web/pages/cpes/details.js	11.11% <ø> (ø)
gsa/src/web/pages/extras/trashactions.js	5.49% <0.00%> (ø)
gsa/src/web/pages/hosts/detailspage.js	23.80% <ø> (ø)
gsa/src/web/pages/hosts/dialog.js	50.00% <ø> (ø)
... and 69 more

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[bjoernricks]

Looks good.