SelectPanel: Remove feature flag from preventBubbling

[TylerJDev]

Part of https://github.com/github/primer/issues/5900

Removes FF usingRemoveActiveDescendant from bubbling prevention function, also accounts for \.

Changelog

New

• Adds \ key to bubble prevention function

Removed

• Removes some usingRemoveActiveDescendant usage

Rollout strategy

• Patch release
• Minor release
• Major release; if selected, include a written rollout or migration plan
• None; if selected, include a brief description as to why

Testing & Reviewing

Merge checklist

• Added/updated tests
• Added/updated documentation
• Added/updated previews (Storybook)
• Changes are SSR compatible
• Tested in Chrome
• Tested in Firefox
• Tested in Safari
• Tested in Edge
• (GitHub staff only) Integration tests pass at github/github (Learn more about how to run integration tests)

[changeset-bot]

🦋 Changeset detected

Latest commit: 5f5ccee

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@primer/react	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[github-actions]

👋 Hi, this pull request contains changes to the source code that github/github-ui depends on. If you are GitHub staff, test these changes with github/github-ui using the integration workflow. Or, apply the integration-tests: skipped manually label to skip these checks.

[github-actions]

👋 Hi, there are new commits since the last successful integration test. If you are GitHub staff, test these changes with github/github-ui using the integration workflow. Or, apply the integration-tests: skipped manually label to skip these checks.

[github-actions]

👋 Hi, there are new commits since the last successful integration test. If you are GitHub staff, test these changes with github/github-ui using the integration workflow. Or, apply the integration-tests: skipped manually label to skip these checks.

[primer-integration]

👋 Hi from github/github-ui! Your integration PR is ready: https://github.com/github/github-ui/pull/6902

[primer-integration]

🟢 ci completed with status success.

[github-actions]

👋 Hi, there are new commits since the last successful integration test. If you are GitHub staff, test these changes with github/github-ui using the integration workflow. Or, apply the integration-tests: skipped manually label to skip these checks.

[github-actions]

👋 Hi, there are new commits since the last successful integration test. If you are GitHub staff, test these changes with github/github-ui using the integration workflow. Or, apply the integration-tests: skipped manually label to skip these checks.

[Copilot]

Pull Request Overview

This PR removes the usingRemoveActiveDescendant feature flag from the SelectPanel's preventBubbling function and adds support for the forward slash (/) key to prevent event bubbling during typeahead interactions.

Key Changes

• Removes the conditional application of preventBubbling based on the usingRemoveActiveDescendant feature flag, making it always active
• Adds the forward slash (/) key to the set of keys that trigger bubble prevention (alongside alphabet keys)
• Removes the feature flag variable declaration from the component

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
packages/react/src/SelectPanel/SelectPanel.tsx	Removes usingRemoveActiveDescendant feature flag declaration and conditional logic; unconditionally applies preventBubbling to overlay keyDown handler; adds forward slash key handling to preventBubbling function
.changeset/solid-turkeys-shop.md	Adds changeset documenting the removal of usingRemoveActiveDescendant usage as a patch release

[github-actions]

👋 Hi, there are new commits since the last successful integration test. If you are GitHub staff, test these changes with github/github-ui using the integration workflow. Or, apply the integration-tests: skipped manually label to skip these checks.

[francinelucca]