Improved:
- Add an option to the GRIB display to allow only one info bubble for compatibility with previous WeatherTrack versions.
Fix:
- The previous version of the city data base was incompletely imported.
- Do not ask again for downloading the hires map if the transaction with the app store is in progress.
- Fix some rounding issues with the display of isothermes.
- Fixed direction if head wind in apparent wind calculation.