Use a floating toolbar in the seamless skin

Infinite scrolling is great, until you have to scroll all the way to the top to do anything.

* Use something like the [bootstrap affix plugin](http://getbootstrap.com/2.3.2/javascript.html#affix) to stick the toolbar to the top.
* Try responsive containers/classes menus that float on the right side if there's room, but are fixed to the top as drop-downs if there isn't.
* Make sure this plays nice with the iframe height adjustments and auto-scrolling.