Impossible to terminate beet from task tray on Linux Mint 19.1

I installed latest .deb version "beet_0.6.2_amd64.deb" and it is impossible to terminate it. With left click on tray icon it opens beet window with right click it does nothing. Only way to terminate was to kill it from the terminal.

- OS: Linux Mint 19.1 Cinnamon kernel 4.13.0-43

Reproduce the issue using the beet_0.6.2_amd64.deb package on Linux Mint 19.1 with Cinnamon and kernel 4.13.0-43, then inspect the desktop task-tray behavior. Done means the tray icon still opens the beet window on left click, provides a way to terminate the application on right click, and no terminal kill is required.

Written by the indexing model from the issue text.