How?  Or How can I hide any object for that matter?

I can set an object to Unmanaged.  But it still is listed.  I've browsed through the menus, searched the docs, the forums, and Googled, and I still can't find where to actually set a 'Hide' flag.

I want to hide some irrelevant objects.  For example, my PC's Virtualbox IP subnet, only used on my PC, is something I will never ever want status on, and is just noise on the list of objects.