Updating FloatingGlucose to .NET 5 - Display Nightscout or Dexcom Glucose Values on the Windows Desktop

Last month I learned how to convert a 13 year old .NET app to modern .NET 5 with the "try convert" tool. It was surprisingly easy to bring a "legacy" app well forward to a pretty darn cool self-contained app. That means NO .NET install. Just run an exe and you're set.