While I like that you've modeled Clickfunnels editor for this, what I never liked about CF is they have no true mobile friendly navigation. Your editor doesn't have any kind of navigation. I would recommend checking out Kartra and how they are doing it as a good starting point. However, the downside to Kartra is their navigation is tied to the entire row instead of being an individual element that can be moved around. So if you had a mobile friendly navigation element that can be added anywhere the user wants, that would make things better in my opinion.

FB-I-16