Add support for 5:4 and 4:3 proportion screen monitors

[Ketjow3]

As I can see there's only 16:9 (16:10) proper game screen.
I have 5:4 monitor and game look like strap in middle of monitor.
Could You please add this 5:4 and 4:3 proportion monitor support?
Or there's some trick to make this now happen?

[Margus]

It is in our long-term roadmap, but unfortunately how the things have been built require a lot of re-work to support different aspect ratios.