Am I missing the obvious here, where can I configure tabbed widgets? I'm running the latest Beta and only seeing the ability to group which puts them into 2 columns. I've tried every widget and have not seen the tabs options.
Sorry that it was a bit hard to find... After grouping widgets, you should be able to click the group name in the list and configure it (the group). In this screenshot, you should be able to click "Group 218" to change its name and layout etc.