d), available for menu type only
* @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 using the configuration key "indicator_duration". Add a colon and integer number to specify an individual timeout, e.g. 'blink:15' (optional)
	You can also set an indicator icon, text and color by passing these as additional parameters in the icon, te