How to make discord open with left click on system tray.

Dunno, I just ran across it in instructions for another electron app, and was happy to see it worked on discord too. But my icon didn't change size... may have to do with scaling factor and shelf size etc... although it would be nice if it was a little smaller for me, its my biggest systray icon...  Blow is my systray shelf; left five icons are on systray itself.