Feature/UI/combobox (#3409)

* Remove invalid markup from index.html

* Allow all tests to run

* Accessibility improvements

* Tidy up combobox hiding logic

* Update accessibility tests

* Revert to use short syntax

* Reduce visual noise in PR

* First review

* Remove superflous $data calls to improve performance

* Revert $refs syntax

* Match tailwind logic for active optiton while typing

* add unit tests

* Update index file

* Finishing touches on combobox

* Fix combobox accessibility

* Preserve selected state when opening box

* wip

* make sure we select the first match in the DOM for multiselect with more then one option selected

* Preserve active key for combobox only if activated by the user using the navigation keys

* Add test

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Co-authored-by: Caleb Porzio <[email protected]>