Sun-Moon Flat Earth Astrolabe

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Flight route display bug fix. Gave it a more astrolabey look as it is a tribute to the beautiful astrolabe.

Filtered flight routes to a smaller set to reduce load time. Refactoring and optimisations of the whole app, now much faster refresh rates, lower memory use, changed threading and rendering to prepare for upcoming new features and layers.

Added static historical flight paths as optional overlays on both the AE and "normal" map as they are fascinating to compare.