Maybe because I am new, but when I am looking at stuff on the Admin page, it is a bit annoying that it isn't split where shown in the picture below.
Because I select something from the left side and it opens to the right.
As I scroll that part the left side also scrolls.
Not a big deal, but as the left is more a Menu of options available and the right is an expansion of that: the two aren't really associated.
So having them scroll at the same time is .... confusing.