test: Fix act errors in Menu test

[lyndsiWilliams]

SUMMARY

This PR fixes 53 act errors in superset-frontend/src/views/components/Menu.test.tsx

TESTING INSTRUCTIONS

• cd into superset-frontend/src/views/components
• run npm run test superset-frontend/src/views/components/Menu.test.tsx
• Observe that there are no act errors in the console

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API

[codecov]

Codecov Report

Merging #21391 (47a6c0d) into master (5f9f657) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #21391      +/-   ##
==========================================
- Coverage   66.61%   66.61%   -0.01%     
==========================================
  Files        1791     1791              
  Lines       68559    68559              
  Branches     7319     7319              
==========================================
- Hits        45671    45668       -3     
- Misses      21002    21004       +2     
- Partials     1886     1887       +1     

Flag	Coverage Δ
hive	52.97% <ø> (ø)
javascript	52.80% <ø> (-0.01%)	⬇️
mysql	80.83% <ø> (ø)
postgres	80.88% <ø> (ø)
presto	52.87% <ø> (ø)
python	81.36% <ø> (ø)
sqlite	79.43% <ø> (ø)
unit	50.83% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...perset-frontend/src/views/components/RightMenu.tsx	60.83% <0.00%> (-2.50%)	⬇️

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