Filterprovider improvements

[bjoernricks]

Handle errors safely

Checklist:

• Tests
• CHANGELOG Entry

[swaterkamp]

Just a small quantitative adjustment :)

[codecov]

Codecov Report

Merging #1653 into master will increase coverage by 0.83%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master   #1653      +/-   ##
=========================================
+ Coverage   41.56%   42.4%   +0.83%     
=========================================
  Files        1048    1048              
  Lines       24063   24075      +12     
  Branches     6721    6702      -19     
=========================================
+ Hits        10002   10209     +207     
+ Misses      12757   12589     -168     
+ Partials     1304    1277      -27

Impacted Files	Coverage Δ
gsa/src/web/entities/filterprovider.js	100% <100%> (ø)	⬆️
gsa/src/gmp/models/filter.js	100% <100%> (ø)	⬆️
...rc/web/components/provider/subscriptionprovider.js	47.05% <0%> (+8.82%)	⬆️
gsa/src/web/pages/audits/listpage.js	76.92% <0%> (+15.38%)	⬆️
gsa/src/web/entities/withEntitiesContainer.js	95.45% <0%> (+18.18%)	⬆️
gsa/src/web/pages/policies/listpage.js	100% <0%> (+18.18%)	⬆️
gsa/src/web/entities/container.js	33.21% <0%> (+31.46%)	⬆️
gsa/src/web/components/powerfilter/powerfilter.js	49.39% <0%> (+43.37%)	⬆️
gsa/src/web/entities/page.js	69.56% <0%> (+63.04%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update cfdc841...f304d49. Read the comment docs.