@Žajdlík Josef: hmm agree that "wind" is probably not the best icon, anyway DarkSky API return just an options (
https://darksky.net/dev/docs/response ) clear-day, clear-night, rain, snow, sleet, wind, fog, cloudy, partly-cloudy-day, or partly-cloudy-night as "icon". So these leaves just represent "windy" weather.
@balloni55: when I do this, I see at top popup message that "Track is not stored in database" which is same as "changes will be lost". Maybe change this text to make it more clear?