expose preventDefault in react hook

[myOmikron]

Is your feature request related to a problem? Please describe.
I'd like to have a custom Save function on CTRL + S but it opens the browser save dialog.

[RobertWHurst]

This seems like a reasonable desire indeed. I'll see if I can get to it in the near future, but at the moment I'm quite busy. If anyone wants to help with this I'm happy to take a look at PRs.