Bug 7979 [FOLLOW-UP] New design for staff interface

Bug 7979 [FOLLOW-UP] New design for staff interface

This follow-up changes the structure of the page
so that it uses a standard YUI grid structure. This
helps keep the page flexible while preventing the
buttons from wrapping below the news block. The buttons
have been given a percentage width and a max-width value.

The benefit to flexibility is countered by the less-
strict spacing of the buttons. The columns of buttons
don't form a strict grid at higher screen widths.

There is probably a middle ground between this and
the previous design but I think we need to make it a
priority for the design not to break at 1024x768.

Another minor change: A tweak to the position and
padding of the icons.