Thank you for the big job you have put in to PGAdmin 4. I'v already experienced big improvements in stability compared to PGAdmin 3.
I'm however missing, or just unable to find, the "Server status" that was accessed under Tools in 3. Parts of it is in the dashboard but not with the same good oveview with Query start, locked by and SQL code. This overview is very helpful in case of problems with slow responsetimes for end users.
Is it planned for a coming release?
BR Oscar
When a server is selected, look at the "Statistics" tab. That has more info, but is missing a few things.
One of my core uses of pgAdmin was the auto-updating color-coded view of the Backends, as you mention, AND the ability to kill queries and backends.
I'm curious to hear some feedback on this as well.