Any item connected to usb should be displayed in a tab in the panels system notification area in the USB icon named "Device Notifier" even if connected object cannot be modified in anyway or be mounted/unmounted.
it is wishlist item
Could you please add more information why this is useful? To view the USB device tree, we have KInfoCenter.
Make kinfo center available via system notification areA, some people have hubs and like to know whats active
Sorry, I'm not sure this request makes sense. Most users only want to see USB devices that can be interacted with in some way; the only people who would like to see all connected devices are computer enthusiasts and software developers, for whom opening KInfoCenter (or just using `lsusb`) are simple.