Weather forecast settings match current weather
Weather forecast settings match current weather

This change makes the config of weather forecast more in line with
current weather. It uses the configured units (metric, imperial,
default) to determine the sign.

MichMich/MagicMirror,berlincount/MagicMirror,vyazadji/MagicMirror,roramirez/MagicMirror,MichMich/MagicMirror,berlincount/MagicMirror,roramirez/MagicMirror,marc-86/MagicMirror,MichMich/MagicMirror,Tyvonne/MagicMirror,morozgrafix/MagicMirror,Tyvonne/MagicMirror,berlincount/MagicMirror,n8many/MagicMirror,heyheyhexi/MagicMirror,marc-86/MagicMirror,vyazadji/MagicMirror,thobach/MagicMirror,thobach/MagicMirror,morozgrafix/MagicMirror,marc-86/MagicMirror,thobach/MagicMirror,Tyvonne/MagicMirror,Tyvonne/MagicMirror,n8many/MagicMirror,heyheyhexi/MagicMirror,vyazadji/MagicMirror,roramirez/MagicMirror,morozgrafix/MagicMirror,heyheyhexi/MagicMirror,morozgrafix/MagicMirror,berlincount/MagicMirror,n8many/MagicMirror,n8many/MagicMirror,n8many/MagicMirror,heyheyhexi/MagicMirror,thobach/MagicMirror,marc-86/MagicMirror,roramirez/MagicMirror,MichMich/MagicMirror