feat: Whitelisted namespace in UI

[rachelwang20]

Checklist:

• Either (a) I've created an enhancement proposal and discussed it with the community, (b) this is a bug fix, or (c) this does not need to be in the release notes.
• The title of the PR states what changed and the related issues number (used for the release note).
• I've updated both the CLI and UI to expose my feature, or I plan to submit a second PR with them.
• Optional. My organization is added to USERS.md.
• I've signed the CLA and my build is green (troubleshooting builds).

Issue link: #2900

[codecov]

Codecov Report

Merging #3314 into master will increase coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3314      +/-   ##
==========================================
+ Coverage   39.25%   39.28%   +0.03%     
==========================================
  Files         175      175              
  Lines       19018    18956      -62     
  Branches      272      237      -35     
==========================================
- Hits         7465     7447      -18     
+ Misses      10626    10591      -35     
+ Partials      927      918       -9     

Impacted Files	Coverage Δ
ui/src/app/shared/models.ts	100.00% <ø> (ø)
ui/src/app/shared/services/projects-service.ts	19.71% <ø> (ø)
server/application/application.go	28.55% <0.00%> (-0.04%)	⬇️
ui/src/app/applications/components/utils.tsx	49.83% <0.00%> (ø)

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[jannfis]

Seems I missed the UI part when updating the contribution guide. Fix underway @ #3315. Sorry for that, @rachelwang20

[alexmt]

Thank you for PR @rachelwang20 . Added two minor comments. Also please resolve linter warning:

yarn run v1.19.1
$ tslint -p ./src/app

ERROR: /Users/amatyushentsev/root/go/src/github.com/argoproj/argo-cd/ui/src/app/settings/components/project-edit-panel/project-edit-panel.tsx:21:1 - Exceeds maximum line length of 180
ERROR: /Users/amatyushentsev/root/go/src/github.com/argoproj/argo-cd/ui/src/app/settings/components/project-edit-panel/project-edit-panel.tsx:21:29 - Replace `sourceRepos:·[],·destinations:·[],·roles:·[],·syncWindows:·[],·clusterResourceWhitelist:·[],·namespaceResourceBlacklist:·[],·namespaceResourceWhitelist:·[],·...props.defaultParams` with `⏎················sourceRepos:·[],⏎················destinations:·[],⏎················roles:·[],⏎················syncWindows:·[],⏎················clusterResourceWhitelist:·[],⏎················namespaceResourceBlacklist:·[],⏎················namespaceResourceWhitelist:·[],⏎················...props.defaultParams⏎············`

[alexmt]

LGTM, thank you!