Code review comment for lp://staging/~zsombi/ubuntu-ui-toolkit/bottomEdge

I don't understand what "push content into the layout" does, and why when I open the bottom edge with that checkbox checked, it says state: hidden in the header: https://www.dropbox.com/s/dns1zeuivsdfn49/Screenshot%202015-11-23%2021.29.50.png?dl=0