.without_sidebar floats and has 50%

[krtschmr]

Why is #active_admin_content.without_sidebargetting width: 50% and float: left?

I believe we shouldn't give this container any style and let the user decide what todo. With sidebar i get the point of 75%/25% , because the sidebar needs space, but without it should be 100% and no float. so then we can decide if we need 100% width, making a row , container or whatever.