s (optional)
* @param {color[?](icon0to5,hidden,blank)=icon0} array of colors; 'icon0' through 'icon5' or e. g. '#f00' for red (optional, default: icon0)
	additionally you can use 'hidden' to not diplay at all or 'blank' to make it invisible but preserve the space that would be used.
* @param {color(icon0to5,blink,simulate,:)=} activity indicator which is active until response (or a timeout  is reached); pass either a color, icon class, 'blink' or 'simulate'. Timeout is 3s by default and can be set globally