Keyboard stroke to wake up screen

[hallmar]

So I use a keyboard with my Norns around 90% of the time.
The screen goes to sleep after x amount of time and using the keyboard to wake up the screen is not possible.

It's probably a very small enhancement, but it would be cool if a keystroke from a keyboard would wake up the screen.
I'm guessing a screen.ping() somewhere in keyboard.lua would do the trick?

[hallmar]

Ok just did a test with adding screen.ping() to line 134 in keyboard.lua
It's working.

Will do a PR