Client HTML Repr no longer as engaging at first glance

Previously calling `client` would give me a quick at-a-glance view of important statistics, like total memory, total number of workers, and total number of threads. This information is still present, but I need to click and expand the cluster info section.

We've opted for generality, but removed some ease in the common case with this decision I think. Thoughts @jacobtomlinson ? Maybe there is a nice middle ground to be found.