Diacritic folding for autocompleted text fields

[1ec5]

Along the lines of #28, it would be great if AVIM could modify the default autocomplete behavior of any text field to perform case folding, so that input like “d” could match “đá”, analogous to what Internet Explorer does for CJK IMEs with the getCompositionAlternatives() API. MDN has an example of a custom autocomplete component.