feat: improve event dashboard top nav

[snitin315]

Short description of what this resolves:

Fixes #4592

Changes proposed in this pull request:

• Show "View"
• Open event link in new tab
• Only show "Preview" for unpublished events

Checklist

• I have read the Contribution & Best practices Guide.
• My branch is up-to-date with the Upstream development branch.
• The acceptance, integration, unit tests and linter pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

[vercel]

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🔍 Inspect: https://vercel.com/eventyay/open-event-frontend/9nkqev6o5
✅ Preview: https://open-event-frontend-git-fork-snitin315-fix-event-dashboard.eventyay.vercel.app

[codecov]

Codecov Report

Merging #4616 into development will increase coverage by 0.42%.
The diff coverage is n/a.

@@               Coverage Diff               @@
##           development    #4616      +/-   ##
===============================================
+ Coverage        22.27%   22.69%   +0.42%     
===============================================
  Files              474      474              
  Lines             4988     4988              
  Branches             8        8              
===============================================
+ Hits              1111     1132      +21     
+ Misses            3876     3855      -21     
  Partials             1        1              

Impacted Files	Coverage Δ
app/components/event-card.js	70.00% <0.00%> (+10.00%)	⬆️
app/controllers/index.js	70.00% <0.00%> (+30.00%)	⬆️
app/models/event.js	53.84% <0.00%> (+30.76%)	⬆️
app/utils/internal.js	75.00% <0.00%> (+50.00%)	⬆️
app/mixins/custom-primary-key.js	50.00% <0.00%> (+50.00%)	⬆️
app/utils/string.js	100.00% <0.00%> (+66.66%)	⬆️

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[iamareebjamal]

Please always add screenshots for UI changes

[snitin315]

Here is the GIF -

[iamareebjamal]

@mariobehling I'm a bit confused if this is the expected result. Please check

[mariobehling]

Yes, this is the expected result. View/Preview opens in new tab, right? Then please accept this PR.

[snitin315]

Yes, this is the expected result. View/Preview opens in new tab, right? Then please accept this PR.

Yes, it opens in a new tab now.

[mariobehling]

Good. There is a follow up issue here: #4621