The "Filter your data" search box on top of the list of dbs/collections allows to filter databases and collections. In databases with a large number of collections this is very useful to have quick access to the colletion(s) of interest without the need to scroll through the whole collection list in the collections screen.

Unfortunately this filter has no effect on the collections list which ist provided in the collections screen. It would be very useful if this list would also be filtered by the filter term to have the collections of interest side by side with their metrics (Documents, Avg. Document Size, ...).

In short: Also filter the collection list in the collections screen by the "Filter your data" term.