a8n: "Collapse" buttons do the opposite of each other

Created by: mrnugget

When looking at a list of changesets the buttons to collapse/expand the content of a changeset are wrong, I think.

It has the opposite state of the collapse/expand button that's used for collapsing/expanding a diff.

Take a look:

I personally think the button for the diff is correct: pointing down when expanded and pointing up when collapsed.