If I run Toolbar and in the dialog go to Edit>New Toolbar, a new toolbar is created with the name “Toolbar”. the toolbar is highlighted in the list, but the name is not active, so currently if one starts typing a new name, it just creates the toolbar as “Toolbar”. It would be nice if the name was highlighted so that one could immediately type a new name like making a new layer works.
In my current Rhino it works the way you want it. 8.4.24009.13521