Minor name fix for OpenStreetMap project
Map displays accuracy again.

Refactored code removed in eec3265
Now with better context
Added a refresh button to make things less confusing.
Merge pull request #516 from Firefishy/patch-1

Fix OpenStreetMap project name. (@Firefishy)
Merge pull request #519 from tamcap/map_accuracy

Display map accuracy overlay (@tamcap)