See which Recommendations activities are being referenced from within "Collections"

We are trying to tidy up our Recommendations catalog - there are a lot of old Collections that we would like to delete, but we are unable to as they are still being referenced by old activities. 

It's starting to slow down our productivity and as many Collections have similar names it's difficult to see which should/shouldn't be used.

Ideally, when you open a Collection, it would be good to be able to see the activit(ies) are using/referencing that collection.