@W-12627152@ Improve refinement button ARIA labels

[wjhsf]

Note: Built on #1605, so the changes in refinements.jsx and most of the changes in radio-refinements.jsx will disappear when that is merged.

This just adds "add/remove filter" to the ARIA labels for each refinement button.

Description

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

• (change1)

How to Test-Drive This PR

• Start dev server
• View a category or search page
• Activate VoiceOver
• Tab through each kind of refinement (radio, checkbox, size, color).
• When not selected, the readout should be "Add filter: "
• When selected, the readout should be "Remove filter: "
• For color refinements, the readout should include the hit count
• With selections made, tab into the "selected refinements" buttons at the top of the results
• Tabbing through each button should say "Remove filter: "
• The "clear all" button should be read out as "clear all refinements"

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)

[vmarta]

Looks like this is not part of the original ticket's ACs... Cool, thanks for going the extra mile.

[vmarta]

FYI I've disabled the auto-merge for the current PR. Let's wait for the other PR #1605 to be merged first.