Lost an entire collection by mistake, is there a way to get it back?

I just discovered, the hard way, that clicking update on a collection when that collection is closed will replace the contents of that collection with the currently opened window.

I just lost a lot of work that way due to "fumble fingers".

I think it could be a helpful feature to have either "undo", or in the situation where there are no common tabs between the new contents of the collection and the old contents to ask the user for confirmation.