non-unique id

[DIDoS]

Dragging and dropping several elements leads to errors in Chrome (64.0.3282.140):

[DOM] Found 2 elements with non-unique id #checkboxes-1: (More info: https://goo.gl/9p2vKq) <input type=​"checkbox" name=​"checkboxes" id=​"checkboxes-1" value=​"2">​ <input type=​"checkbox" name=​"checkboxes" id=​"checkboxes-1" value=​"2">​

bloggify.github.io/:1 [DOM] Found 2 elements with non-unique id #radios-0: (More info: https://goo.gl/9p2vKq) <input type=​"radio" name=​"radios" id=​"radios-0" value=​"1" checked=​"checked">​ <input type=​"radio" name=​"radios" id=​"radios-0" value=​"1" checked=​"checked">​

[IonicaBizau]

Well, of course, because they end with the same ids in the HTML.
Ideas are welcome to fix this!

[IonicaBizau]

These warnings should be fine. We can change the ids in the settings of each element.