fix(Dashboard): Handle undefined tab when collapsing tabs

[geido]

SUMMARY

It handles collapsing tabs when there is no tab left.

BEFORE

Fixes #17180

AFTER

untitled.dashb.mp4

TESTING INSTRUCTIONS

1. Edit a Dashboard
2. Add a tab component
3. Delete all tabs and collapse

ADDITIONAL INFORMATION

• Has associated issue: [dashboard edit] unexpected error appears when user tries to collapse tab content  #17180
• 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

[kgabryje]

Added non-blocking comment, other than that lgtm!

[codecov]

Codecov Report

Merging #17183 (d7df66e) into master (4c708af) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master   #17183      +/-   ##
==========================================
- Coverage   76.91%   76.91%   -0.01%     
==========================================
  Files        1039     1039              
  Lines       55568    55568              
  Branches     7570     7571       +1     
==========================================
- Hits        42742    42741       -1     
- Misses      12576    12577       +1     
  Partials      250      250              

Flag	Coverage Δ
javascript	70.93% <100.00%> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
...d/src/dashboard/util/getLeafComponentIdFromPath.js	100.00% <100.00%> (ø)
...eFilters/FiltersConfigModal/FiltersConfigModal.tsx	86.90% <0.00%> (-0.60%)	⬇️

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[geido]

/testenv up

[github-actions]

@geido Ephemeral environment spinning up at http://52.33.222.248:8080. Credentials are admin/admin. Please allow several minutes for bootstrapping and startup.

[github-actions]

Ephemeral environment shutdown and build artifacts deleted.

[rosemarie-chiu]

🏷 2021.42