Full screen board#594

Show opponents board full screen in browser when he throws. So you can actually see the darts in the board from a distance.
When you are back at the oche, you want to watch your opponent throw, but you need to be very close to your computer to see now.

On laptop the board he’s throwing on is smaller than my phone screen. Zooming only works for that one throw. Be nice to be able to have the board use up at least half the screen and not have stats and score take up 75 percent