Adjust calculation for turn indicator placement
Adjust calculation for turn indicator placement

This helps move the indicator a bit further away in cases where
turn.to.node is right up very close to the turning vertex

morray/iD,digidem/iD,ngageoint/hootenanny-ui,openstreetmap/iD,kartta-labs/iD,kartta-labs/iD,AndreasHae/iD,openstreetmap/iD,mapmeld/iD,mapmeld/iD,AndreasHae/iD,ngageoint/hootenanny-ui,openstreetmap/iD,mapmeld/iD,ngageoint/hootenanny-ui,morray/iD,kartta-labs/iD,AndreasHae/iD,digidem/iD