- Move to Wikimedia Maps for the radar imagery.  It's cleaner and still OpenStreetMap
 - Drop half of skin.conf as starting with weewx 3.9 we can get that information right from the weewx.conf (remove duplication configuration)
 - Beta Dark mode - use the media prefers-color-scheme: dark setting to switch the bootstrap theme from flatly to darkly.  I don't really like the topography of the -ly themes but this works nicely to give a less blinding webpage when I check in on the weather page at night.