Firefox didn't display the item actions very well. They were being

wrapped to the following line, due to a combination of float: right

and white-space: nowrap (ironically).
To fix this, we now put all the action elements in a new <span> that's

floated right and placed as the first element in the item. This gives us

the look we want across all browsers.
The spinner is also now properly vertically aligned, and placed right

before any actions (if there are any).

Tested with multiple actions and with a spinner on Chrome and Firefox.