Keyboard search controls no longer work on master docs site

[justinmc]

Describe the problem

Keyboard controls recently don't work on the search field in master., but they do in api..

To reproduce

1. Visit a page on the master docs, such as https://master-api.flutter.dev/flutter/rendering/RenderObject/showOnScreen.html.
2. Focus the search field in the top right.
3. Type a query, like "Container".
4. Try to use the enter key to go to the first result, or the arrow keys to select a result.

Expected: Keyboard works.
Actual: Nothing happens.

Currently the api. docs site still has correct behavior and works fine with the steps above: https://api.flutter.dev/flutter/rendering/RenderObject/showOnScreen.html

Expected fix

Keyboard controls should still work!

Additional context

I can navigate results using the keyboard on api. like this, but on master nothing happens:

[parlough]

This issue is being tracked in dart-lang/dartdoc#3052 on the dartdoc repository. Thanks for reporting this!