value for shutter on top end (optional, default 0)
* @param {value=255} the value for shutter at bottom end (optional, default 255)
* @param {color[?](icon0to5,!)=icon1} 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)
*
* @author: Wolfram v. Hülsen
*/
{% macro window(id, item_value, item_window_r, item_window_l, min, max, color) %}
{% if color is empt