Adjust OSM cycle route layer

[dabreegster]

1. Filter out state=proposed
2. When name is missing and description is present, plumb that through as the tooltip we display

[Robinlovelace]

Good to see this, didn't realise it was used. Just happened across this example from near Newcastle for reference: https://www.openstreetmap.org/relation/12082803#map=13/54.82624/-1.58382