Fix #2797: Chips add onKeyDown and KeyFilter

[melloware]

###Feature Requests
Fix #2797: Chips add onKeyDown callback and KeyFilter ability

Give the user a chance to intercept and prevent keys. For example...

    const onKeyDown = (event) => {
        if (event.which === 65) {
            event.preventDefault();
        }
    }

[mertsincan]

Wow! Is it work? @melloware. If yes, please merge it asap :)

[melloware]

Yep this works great! Merging.