I would like to write an application that runs on Ubuntu 24.04 with .NET 8.0 and which has a main window that can be hidden, with what I believe is called an “app indicator” in the top right. I come from the Windows world, where what I’m looking for would be referred to as a “system tray icon” — I’ve done a bunch of searches trying to figure out how this is done and have just found vague references to “D-BUS menus”, I think that’s what I’m looking for here?