Hi Alex,
thanks for the response 
i believe you are suggesting “Tidy” feature correct?
if yes,
that does clean only the media items, how about the layouts?
my point is,
we need to somehow be able to find out which layouts are not in use?
because we simply cannot delete the layouts if we are not sure which is in use and which isn’t.
When i try to delete a layout which is in use,
system does not warn me about layout being in use which is not any helping.
Best regards