OK, it is not really a bug. It's more a feature request.
At the moment when I expand a schema in the browser, then I see nodes for collations, domains, tables, . It would be nice to see the counter of elements under this nodes. Functions (0), Tables (31), . Sometimes I need manually expand nodes to see if there is something or not. If it is already on the to-do list, then ignore this message. When you're collecting same requests, then you can add my vote to it. pgAdmin 4 v1.5 Desktop Runtime Windows 10 x64 1511