No Tray icon and Minimize to Tray on macOS

[eduardomozart]

Describe the bug
There's an option to show Tray icon on macOS but it didn't show and when clicking on "X" button it closes the app instead of minimizing it as the WhatsApp Desktop client does. It's okay to close it, but it would be great if there's any option to allow to change this behavior.

To Reproduce
Steps to reproduce the behavior:

1. Open the Altus.
2. Close the Altus using "X" button on macOS.

Expected behavior
The app could allow to minimize instead of closing on "X" button.

Screenshots
If applicable, add screenshots to help explain your problem:

Information:
Version Info (Go to About > About and click "Copy Version Info"): 4.8.6

Additional context
Add any other context about the problem here.

[elig0n]

Same on Linux with same version altus-appimage from AUR