Filter dialog does not duplicate filter term

[saberlynx]

Checklist:

• Tests
• CHANGELOG Entry

[codecov]

Codecov Report

Merging #1705 into gsa-9.0 will decrease coverage by 0.15%.
The diff coverage is 75%.

@@             Coverage Diff             @@
##           gsa-9.0    #1705      +/-   ##
===========================================
- Coverage    47.38%   47.23%   -0.16%     
===========================================
  Files         1047     1047              
  Lines        24139    24139              
  Branches      6747     6746       -1     
===========================================
- Hits         11438    11401      -37     
- Misses       11561    11592      +31     
- Partials      1140     1146       +6

Impacted Files	Coverage Δ
gsa/src/web/components/powerfilter/filterdialog.js	1.4% <0%> (ø)	⬆️
gsa/src/gmp/models/filter.js	100% <100%> (ø)	⬆️
gsa/src/web/pages/audits/listpage.js	76.92% <0%> (-15.39%)	⬇️
...rc/web/components/provider/subscriptionprovider.js	87.5% <0%> (-12.5%)	⬇️
gsa/src/web/entities/container.js	42.3% <0%> (-11.19%)	⬇️
gsa/src/web/pages/tlscertificates/component.js	10.34% <0%> (-0.37%)	⬇️
gsa/src/web/pages/audits/component.js	38.51% <0%> (-0.11%)	⬇️
gsa/src/web/pages/credentials/dialog.js	2.8% <0%> (ø)	⬆️
gsa/src/web/components/dashboard/display/utils.js	75% <0%> (ø)	⬆️
...a/src/web/pages/tickets/dashboard/statusdisplay.js	30% <0%> (ø)	⬆️
... and 9 more

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[bjoernricks]

Could you add a CHANGELOG.md entry too?