fix: make featured and promoted events sortable in admin

[maze-runnar]

Fixes #4696

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)

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[maze-runnar]

@iamareebjamal please review.

[codecov]

Codecov Report

Merging #4772 into development will increase coverage by 0.05%.
The diff coverage is n/a.

@@               Coverage Diff               @@
##           development    #4772      +/-   ##
===============================================
+ Coverage        22.82%   22.88%   +0.05%     
===============================================
  Files              478      478              
  Lines             5060     5060              
  Branches             9        9              
===============================================
+ Hits              1155     1158       +3     
+ Misses            3904     3901       -3     
  Partials             1        1              

Impacted Files	Coverage Δ
app/controllers/admin/events/list.js	0.00% <ø> (ø)
app/components/tabbed-navigation.js	53.33% <0.00%> (+20.00%)	⬆️

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