This is a description of the project completed by me, Yosry Ahmed, during GSoC 2019 for PostgreSQL under the mentorship of Dave Page.
The official project page can be found here: https://summerofcode.withgoogle.com/archive/2019/projects/4883641988022272/
pgAdmin 4 is the most popular and feature rich open source administration and development platform for PostgreSQL, the most advanced open source database management system.