Add High DPI Support for Windows

[rcmurphy]

This makes Pyfa much more readable on 4K displays, and shouldn't cause any issues on non-windows machines.

[DarkFenX]

Last time i checked:
#1225 (comment)
It took much more work than just setting DPI awareness flag. It just disables scaling of window render by GPU, which leads to window contents being too small for hi-dpi screens, and various disproportions, since some elements are scaled using one type of point, others scaled another way.

Either way, tomorrow I will take a look at how it looks on my 3840x2160 display on windows