Prepare for v2.0.0 release

[maciaszczykm]

• make sure that fatal error: concurrent map writes from github.com/kubernetes/dashboard/src/app/backend/settings.(*SettingsManager).load does no longer appear
• display full breadcrumb when viewing replica set logs
• display % next to percentage in the workload statuses

[codecov]

Codecov Report

Merging #5085 into master will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #5085      +/-   ##
==========================================
+ Coverage   45.48%   45.49%   +0.01%     
==========================================
  Files         214      214              
  Lines       10073    10075       +2     
  Branches      100      100              
==========================================
+ Hits         4582     4584       +2     
  Misses       5225     5225              
  Partials      266      266              

Impacted Files	Coverage Δ
src/app/backend/settings/manager.go	30.92% <100.00%> (+1.45%)	⬆️

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[floreks]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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