The storage size we display now when a collection is opened might be a bit misleading as it's the uncompressed, in-memory storage size and not the amount of space the collection takes on disk.

This is especially confusing for time series collections, where compression optimizations make the storage size on disk significantly smaller than the uncompressed size.

In the list of collections, we've already updated the UI to display the compressed size. We should do the same in the collection stats panel that is displayed when a collection is opened.