Comment 5 for bug 1272313

If checking for an update is a multi-step process, that's excellent news, because it means the progress display can be determinate rather than just a spinner. Like the ability to stop, I guess that would require an extra dbus method to ask "how far through are you right now". Reported bug 1276061 for that.

In the meantime, let's treat the Stop button the same as anything else in System Settings that isn't implemented: don't show the UI until it is implemented.