Fix enhanced select not resetting when clearing selection

[AdamMagued]

Fixes #777.

Summary

When using enhanceSelectElement, selecting an option synchronizes the underlying <select> element. However, if the user cleared the autocomplete input, the underlying <select> retained the previously selected option.

This change updates the default onConfirm handler to reset the <select> when the query is cleared or does not match any option:

• If a placeholder option exists (empty value), it is selected.
• Otherwise, selectedIndex is reset to -1.

Testing

• npm run standard
• npm run build
• Added functional test in test/functional/wrapper.js

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[AdamMagued]

closing in favor of #804 where i included the full functional test suite and regenerated dist files. sorry for the duplicate PR!