Apply global colours scheme on dialogs and overlays #FS232
Correct numbers rendering (night mode)
Correct Isoline rendering for no rectangular zone ( Norway forecast for example )
Correct request dialog behavior : geopotential altitude data
only enabled for GFS modele
Correct Grib Overlay orientation
Merge pull request #108 from Ptizef/master

Apply global colours scheme on dialogs and overlays  #FS232