UI scaling for different resolutions

[ETG153]

Is your feature request related to a problem? Please describe.
When playing with a larger desktop resolution such as 4K (3840x2160), the UI elements become difficult to read. If you try to fullscreen the game, the UI elements' visuals become offset from their hitboxes. For example, if a button is near the top of the screen, you have to click well below the button to hit it.

Describe the solution you'd like
A way to scale the game for different resolutions, either using a manual slider or by autoscaling based on the desktop resolution.

Describe alternatives you've considered
Valve's gamescope seems to be usable for this kind of situation, but it must be installed externally and is generally a hassle.

Additional context
Game is run on x86 Linux using Valve's Proton compatibility system

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This issue was closed because it has been stalled for 5 days with no activity.