Fix basic AppKitBackend layout test in CI #112
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After debugging the CI, I discovered that the CI renders at 1x scale instead of 2x scale (retina). This causes the text to get kerned differently and ends up changing the layout in ways that can't be adjusted for by just dividing by two.
This PR is based off ideas from pointfreeco/swift-snapshot-testing#533
The fix was to override the
backingScaleFactorofNSWindowto1.0from a subclass. I also overrode the color space while I was at it just in case.