I’m rather new to webix; is it possible to add personalized icons to menu voices (as seen in many other components, but couldn’t find it yet in this one)?
ok … found the way to do that, probably not the right one 
simply adding before the value-attribute works!
as I don’t see what I just wrote: simply adding an image, i.e. “img src” and the name of the image; that works!
Yep, you can add images or icons to menu template.
The extra markup can be stored directly in values or set through template