Improved layer legend

It’s sometimes hard to get a decent estimate of what value a color means for the weather overlays. It’d be nice if hovering of right clicking on a location would:

  1. Put a marker on the color legend
  2. The exact value would be displayed; possibly next to the marker, next to the legend or within the location popup (e.g. between Position and Airspaces) for all enabled weather layers.

Both would also help improve accessibility, e.g. for color blind people.

Those options could be equally useful in SimBrief, too.