Changed the console blank timeout

The screen blanks after a predefined timeout (during installation).
This change sets that timeout to 60 minutes, buy which time the
installation should hopefully be finished.
That's pretty awesome :+1: 
It seems to work, ie my monitor stays on. But I don't know what made it go off *sometimes* in the past. But I've found a way to 'delay' the installation by x minutes and going to try for 20 and if my monitor still stays on, I'll merge it (but into v1.0.x and master since it doesn't break the 'API')