I would like to initialize the radio in the same way as the combo; however, introducing webix-data attribute prevents it from rendering (see intended radio control commented out.)
Please note in order for the rendering not to break down, options="-" above cannot be removed or even replaced by options="" (you are probably aware of this)
Yep, radio requires the initial set of options, so at least some meaningful value should be provided. The cleaner solution is to define an empty array: http://webix.com/snippet/abba1c48