UI does not scale well on high resolution monitors

[holly-hacker]

The default UI scaling is set to 1, which is very small on a 4k display. I propose changing it to 2 by default.

Here's comparisons on both 4k and 1080p:

UI Scaling 1 on 4k	UI Scaling 2 on 4k

UI Scaling 1 on 1080p	UI Scaling 2 on 1080p

[kennyvv]

I agree that the default scaling doesn't feel right anyways, maybe we should look into changing the way it does this.