As mentioned in commit 5311daadf, there are several reasons to use
buttons in these situations. And, as mentioned in the previous commits,
using buttons instead of links for actions requiring confirmation will
help us test for accessibility issues.
Since we're adding styles for this button, we're also adding the
`font-size` property instead of using the `small` class. We'll deal with
the `float-right` property in the next commit.
891333abed