Disable graph refresh when it is not visible

[floreks]

Fixes #5099

[maciaszczykm]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: floreks, maciaszczykm

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[codecov]

Codecov Report

Merging #5198 into master will increase coverage by 0.03%.
The diff coverage is 57.14%.

@@            Coverage Diff             @@
##           master    #5198      +/-   ##
==========================================
+ Coverage   45.43%   45.46%   +0.03%     
==========================================
  Files         214      214              
  Lines       10094    10099       +5     
  Branches      107      108       +1     
==========================================
+ Hits         4586     4592       +6     
+ Misses       5243     5240       -3     
- Partials      265      267       +2     

Impacted Files	Coverage Δ
.../app/frontend/common/components/graph/component.ts	60.46% <50.00%> (-1.74%)	⬇️
src/app/frontend/shared.module.ts	100.00% <100.00%> (ø)
...p/backend/integration/metric/common/aggregation.go	90.90% <0.00%> (+1.81%)	⬆️
src/app/backend/sync/secret.go	73.26% <0.00%> (+2.97%)	⬆️

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