Small migration of `NewAutocomplete`.

---------

Co-authored-by: Jed Fox <git@jedfox.com>

Implement min-width for the autocomplete to make it look better on small
screens.


https://github.com/actualbudget/actual/issues/773#issuecomment-1482254636

<img width="304" alt="Screenshot 2023-03-31 at 19 02 06"
src="https://user-images.githubusercontent.com/886567/229195868-7d858f18-0c1a-4a9d-95be-5dd0e4aef92c.png">

Seems to build fine, will test later.

Making consistent height between multi/single input autocomplete.