jcforest

## What does this PR do? - Closes #3946 ## Discussion @fregante Is there any specific reason that you added `data-aura-rendered-by` to `UNSTABLE_SELECTORS` list [here](https://github.com/pixiebrix/pixiebrix-extension/blob/main/src/contentScript/nativeEditor/selectorInference.ts#L67)? ## Checklist - [ ]...