[Accessibility] Feature Discovery open/close not accessible by keyboard interaction

[gselderslaghs]

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• I have read the CONTRIBUTING document and my issue is following the guidelines.
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Context

When using the Feature Discovery component, the element does not seem to be intractable by keyboard

Current Behavior

Open/close button is not tabbable/focusable by keyboard interaction

Expected behavior

Component should be accessible by mouse and keyboard input

Possible Solutions or Causes

Implement the necessary functional attributes on initialization in order to make open/close button tabbable/focusable by keyboard interaction

Your Environment

• Version used: 2.1.1

[gselderslaghs]

Changelog

• Implemented keyboard interaction
• Implemented aria-expanded
• Implemented tab-index, this also works with child elements inside the tap target container

This feature is ready for review in pull-request #537

[gselderslaghs]

Closing this as fixed in v2.2.1