Cancelling campaign and all its items

I've just had a new case that I would like to have a faster way to do.

A campaign (event campaign) was cancelled. I had prepared several items around the campaign already. 

I archived the campaign but the items were unchanged. I would have liked to get a question what I would like to do with the items (in this case I wanted to "kill" them).

So I had to manually go into each and every one of the items to set the status to killed. A bulk action would have been great (delete was possible with bulk but I want to keep them as reference).

And then I noticed that the planned social media posts (from the Promotion tab) still were "alive", so I needed to go into each item again and delete these posts.