Update AlphaNum keyboard mapping to close autocomplete when currentValue is empty or too small

[scarfacedeb]

I've added _Close function to AutoComplete that is being called in AlphaNum mapping to hide dropdown when user edits existing query.

Steps to reproduce:

1. Add MinChars: 3 to AutoComplete options.
2. Enter some query that is longer than 3 chars.
3. Autocomplete dropdown is rendered with suggestions.
4. Edit the query to make it 1-2 characters long.
5. Autocomplete dropdown is still visible.

What should've happened:

Dropdown shouldn't have been visible, because query is less than MinChars characters long.

[scarfacedeb]

Any news?

[ghost]

@baptistedonaux
I need exactly the same behaviour. Would love to see this PR merged.

We probably should also call _close with the enter keyboard event. See Line 212.

[baptistedonaux]

Thanks for your contribution !