Correctly scale computer GUIs with custom sizes

[SquidDev]

Since #112 was closed, we've had the ability to reconfigure the dimensions of computer GUIs using the config file. However, it's always be a little janky, as computers do not scale, and so too large sizes do not fit on the screen.

We should automatically resize the computer GUI where needed. I suspect we'll need to make sure fonts are still readable (and not scaled badly) when doing so.

[SquidDev]

Taking this off the 1.97.0 milestone - will hopefully look another day.

My initial approach was just to scale the terminal by 0.5x, and keep the GUI the same ratio. While this works, it ends up looking rather ugly. I think we need to scale the whole GUI when doing this, and somehow deal with all the scaling issues.

Or alternatively, just don't fix it and hope people don't use the config options on the small GUI mode :p.