macOS: render the map at the window backing scale - #4478
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The MTKView keeps the contents scale of 1 it got before the view had a window, so a Retina display gets a half-resolution map.
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The MTKView keeps the contents scale of 1 it got before the view had a window, so a Retina display gets a half-resolution map. After this PR maps are drawn at full display resolution.
Disclosure: this PR was authored using Claude Fable 5