How can I go offline mode in Linux client?

[rtalexk]

I have my premium account since two years ago and I have all my music downloaded so when I leave my home/office I can still listening my music, but I used to connect to my mobile data and if I play the wrong playlist, spotify starts using my mobile data. OSX and Windows has offline mode option in file menu, but Linux client has not kind of that menu.

Researching here in the community forum I found a workaround using Proxy option and a SSH server, but that is so annoying!