* register-new-object.c: if someone isn't root, they should register a
new object in their own gnorba directory; if they're root, they should
have a choice
* Right now, there's some code in idl-browser.c that lets you view
both the tree-view _and_ the clicked-on idl file; this ui should be
improved or dropped, as it's half cooked right now.
* Allow object activation from object-helper notebook page.
* Componentize the notebook pages?