Is there an included way to minimize to a tray icon only ??

[smallhagrid]

As the title says...short of using AllTray (Ubuntu 18.04), is there an included way to minimize Strawberry to a tray icon only ??

I already use AllTray, and have gone all the way through Strawberry's settings, but haven't found such an option.
When done via AllTray there is then a 2nd Strawberry icon and I'd prefer not to have that at all.

Thanks for any helpful replies !!