Float predictions not wrapping vertically correctly

[KevWal]

Not an important one, and I'm struggling to describe this eloquently, but a picture says a thousand words and all that:

Thank you for all your work :)

[darksidelemm]

This is related to #75 and is a limitation in leaflet... and in this case just an issue with map projections. I'm not sure there's going to be an easy solution to it...