* Rework Input and dropdown in DocumentsTab
* Improve input: implement Escape and add clear button
* Undo body :focus outline, since fluent UI has a nicer focus style
* Close dropdown if last element is tabbed
* Fix unit tests
* Fix theme and remove autocomplete
* Load theme inside rendering function to fix using correct colors
* Remove commented code
* Add aria-label to clear filter button
* Fix format
* Fix keyboard navigation with tab and arrow up/down. Clear button becomes down button.
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Co-authored-by: Laurent Nguyen <languye@microsoft.com>
