polargraphcontroller
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Change zoom limits for very large machines
Also change the default zoom level so it makes the machine fill the window on startup. At the moment it is set to 100% which is pixels == mm. Fairly arbitrary.
Default "initial" zoom level now fills the window vertically.
Sometimes this backfires - it looks like the sequence that the code runs in isn't fixed, and sometimes the zoom level is set before the window has finished being sized.