Can one put the AB view of a container in a separate window? How?
Yes. Add a new window to the document (File menu). This duplicates the existing front window. Select the new window, you can now delete tabs you don’t need and set the front one to AB view (one way is by right-clicking the tab and selecting the desired view type). Then configure the AB view for the desired scope.
Or, grab the attribute browser tab and pull down!