I have a Marionette CollectionView where each of the childViews are floating in a grid fashion (where each X is a childView):

```
X X X X
X X X 

```

I'd like to have a plus button that is floating in the grid as well but won't actually be representing an item in the collection. So it would look like this:

```
X X X X
X X X +

```

Does anyone have an idea or strategy for how this could be done with Marionette?