Completed the list of copied props of jQuery.Event.

[andyli]

Source ref: https://github.com/jquery/jquery/blob/master/src/event.js (props, keyHooks.props, mouseHooks.props)

[dmethvin]

This LGTM. It's adding the standard mouse and key event properties to the "also copied" list but since we say they can be undefined that covers the case for things like mouse properties on a key event well enough. Thanks @andyli!

[AurelioDeRosa]

It looks good to me as well, thank you @andyli. Should I merge it?

[kswedberg]

@AurelioDeRosa , yes, please merge away! 👍

[arthurvr]

👍 Thanks!