Fix keydown not working

[t-kuni]

Fix that some keydown(ArrowDown, ArrowUp, Enter) shortcut is not working my environment.

My environment is following:

• windows 10
• Adobe XD veresion 10.0.42.14

[hasansujon786]

@tigmium I had the same problem. You relay fixed the issue. Great Work. 🎉
But still your PR hadn't pulled. 😟

[Nicelo]

I repaired it like this. You can refer to the following。

input.addEventListener("keydown", function (event) {
    if (event.keyCode === 40) {
        if (filtered.length && selectedI < filtered.length - 1) {
            selectedI++;
            gotoArtboard(filtered[selectedI]);
            rerenderList();
        }
    } else if (event.keyCode === 38) {
        if (filtered.length && selectedI > 0) {
            selectedI--;
            gotoArtboard(filtered[selectedI]);
            rerenderList();
        }
    }
});