tries to fix window resize issues #18 #25 #30

[PeterTheOne]

Needs testing.. I didn't installed the app locally, just tested it a bit in the browser. Any help with that?

For now this fixes an overflow issue with the menu and menu positioning.

I think for #30 to get fixed the svg width/height ratio needs to be the same as the viewbox width/height ratio (925/(750 - 45 - 50)).