Speaking as the guy who had the bright idea to package pgadmin4 into [community]... yeah, gave up on it.
I've been using Sqlectron lately, which is neat and small. It also has performance issues and needs love, but it was the only FOSS app I could get working with both postgres and redshift (pg 8.0). It needs developer love if anyone wants to improve its performance etc...
I wish datagrip was open source :/