[A11y][Header] Avoid forced focus changes that are not user-initiated (@W-12627128@) (@W-12627141@)

[adamraya]

Description

The PR adds the title attribute to indicate the link opens a dialogue and keeps the focus on the My Account control element.

Types of Changes

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Documentation update
• Breaking change (could cause existing functionality to not work as expected)
• Other changes (non-breaking changes that does not fit any of the above)

Breaking changes include:

• Removing a public function or component or prop
• Adding a required argument to a function
• Changing the data type of a function parameter or return value
• Adding a new peer dependency to package.json

Changes

• Added title attribute and keep the focus on the popup trigger when using Shift+Tab.

How to Test-Drive This PR

1. Verify the hamburger icon on mobile now has the title attribute.
2. Verify the focus is kept in the My Account menu trigger when using Shift + Tab.
   2.1. Open the My Account menu.
   2.2. Press the Tab key to navigate between the options.
   2.3. Press Shift+Tab multiple times and verify the focus is kept in the popup trigger.

Checklists

General

• Changes are covered by test cases
• CHANGELOG.md updated with a short description of changes (not required for documentation updates)

Accessibility Compliance

You must check off all items in one of the follow two lists:

• There are no changes to UI

or...

• Changes were tested with a Screen Reader (iOS VoiceOver or Android Talkback) and had no issues
• Changes comply with WCAG 2.0 guidelines levels A and AA
• Changes to common UI patterns and interactions comply with WAI-ARIA best practices

Localization

• Changes include a UI text update in the Retail React App (which requires translation)

[shethj]

LGTM! 🚀
We might want to add a test for this though.

[bendvc]

Is there any translation that we can reuse here so we don't have to reach out to the translation team? I'm assuming that the screen ready will read this text aloud?