It's been there since the early days of Mac OS X --- during one UI flamewar on usenet on either comp.sys.next.advocacy or comp.sys.mac.advocacy I suggested it a

It's been there since the early days of Mac OS X --- during one UI flamewar on usenet on either comp.sys.next.advocacy or comp.sys.mac.advocacy I suggested it as a way to address the perception of "wasted" space and it showed up (probably coincidentally) in the next iteration.