Assign entries to categories in bulk? I just accidentally dragged a root category onto another. Now, all of the entries that were assigned to that category are assigned to the one I accidentally dragged it onto. 

Luckily, I have like 7 entries but if this happened with a lot of them I'd be pretty screwed. It seems like a disaster waiting to happen.

Is there an easy way to "bulk assign" categories? If that's not possible is there anyway to add a "Save" button to the category manager so I'd have to click save before the database actually updates? Am I overlooking something really, really obvious here? Definitely wouldn't be the first time.
I think that, right now, the only way to deal with that is at the DB level. I believe you would only have to deal with the craft_relations table for adding / removing categories to entries.