Support Both Left and Right modifiers

### Feature Request

Currently, when you send right modifier keys such as ROption or RControl from macOS, both of them are recognized as LAlt and LCtrl respectively in Windows.

You can check them here: [en.key-test.ru](https://en.key-test.ru/) (seems like the best, as other online keyboard testers don't differentiate between left & right modifiers).

(I'm specifically talking about my setup which is: macOS server, Windows client. I don't know if different OS combination has this behavior or not)