Show remove operation button for the other non-running statuses?

[marikoja]

This is working the way it was intended and solves the issues -- you can see the remove button if an op is scheduled, but not if it's running. I am wondering, though, if we want the button to be visible for the other non-running statuses (pending, delayed, waiting, planning, primed, and error). That's more a question for the end users though. As for now, the remove button is only visible for status "scheduled" and not visible for any of the other statuses.

Originally posted by @cashmonger in #678 (comment)