Ubuntu 16.04 Connecting to L2TP over IPSEC via Network Manager

This is more or less notes for myself but I am also hoping to save some of you from spending too much time setting up something that should be a simple functionality available out-of-the-box in my opinion.

While I am pretty fluid with editing config files (VIM as my choice of poison) and executing shell commands for what I need done, I feel like in this day-in-age, people should just be able to fill in the blanks on a GUI to connect back to their work places via VPN when using any latest flavor of GNU/Linux that comes with a…