All node attributes should show up in the node pane. Attributes could be editable, and the ability to remove or add new attributes. Namespaces should show up in a tooltip if there are attribute namespace in use.
Created attachment 5727 [details] Initial cut Here's an initial cut at adding elements. It's not possible to edit them in any way currently.
Comment on attachment 5727 [details] Initial cut Looks good. Editing can come later.
Committed in r12139.