Fix a ui issue where a visualiser would have both an override and default set for some component

[abey79]

What

Component affected are all whose edit ui is based on ComboBox (or any widget that requires an egui id).

On a debug build, this would lead to this ID clash:

On a release build (e.g. 0.17), this would make the popup menu unusable in a weird way.

Checklist

• I have read and agree to Contributor Guide and the Code of Conduct
• I've included a screenshot or gif (if applicable)
• I have tested the web demo (if applicable):
  • Using examples from latest main build: rerun.io/viewer
  • Using full set of examples from nightly build: rerun.io/viewer
• The PR title and labels are set such as to maximize their usefulness for the next release's CHANGELOG
• If applicable, add a new check to the release checklist!
• If have noted any breaking changes to the log API in CHANGELOG.md and the migration guide

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