Backport Component Inspector Vector3d layout width fix

[iche033]

🦟 Bug fix

Fixes #2192

Summary

Partial backport of #1680

• Only backported the Vector3d layout width fix.
• Pose3d left untouched since it seems to be working fine in ign-gazebo6 (on ubuntu) and there are quite a bit of changes in gz-sim7 so the fix may not apply to ign-gazebo6

Checklist

• Signed all commits for DCO
• Added tests
• Updated documentation (as needed)
• Updated migration guide (as needed)
• Consider updating Python bindings (if the library has them)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
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