an item for the roof window wing status (0/'closed', 1/'tilted', 2/'open') (optional, default = 0)
min
the value for shutter on top end (optional, default 0)
max
the value for shutter at bottom end (optional, default 255)
color
color for 'open' state e.g. 'icon0' through 'icon5' or '#f00' for red. Prepend a '!' to make the color constant ('!icon3'). Color is 'icon0' if window is closed and constant color is not forced. (optional)