Tag select fixes

[PK106552]

Summary

What was changed:

1. Added error message and instruction text to validate invalid example.
2. Screen reader will read as combobox for Terra tag select.
3. When text is typed in search bar first ESC should close the dropdown and then pressing ESC again should clear out the text.
4. Added placeholder text to tag select aria-label.

Why it was changed:

1. There was no error message for invalid example.
2. Terra Combobox component should have a role of combobox and it should be announced by the screen reader.
3. When there is some user typed text in search bar and dropdown of available options is open, first ESC should close the dropdown and then pressing ESC again should clear out the text.
4. Placeholder text was not included to tag select aria-label.

Testing

This change was tested using:

• WDIO
• Jest
• Visual testing (please attach a screenshot or recording)
• Other (please describe below)
• No tests are needed

Reviews

In addition to engineering reviews, this PR needs:

• UX review
• Accessibility review
• Functional review

Additional Details

This PR resolves:

UXPLATFORM-9715

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Thank you for contributing to Terra.
@cerner/terra

[sdadn]

+1

[sdadn]

Is the second condition needed? I would assume that if the OS is Mac then it's automatically not windows.

[PK106552]

Second condition is not need, removed it, thanks

[stale]

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