How do we configure a landing page (or other) to show an extra submenu item (next to Versions, Relations and Permissions) in the Properties menu, where the custom menu item opens a custom plugin (in the same container/context)?
Mikael - thanks again for reviewing and using the new D2 Smart View SDK. This particular inquiry - using a custom submenu is not yet supported. I will add this to the roadmap.
(side note, I added a tag of "D2 Smart View SDK". We have a special team looking for any inquiries that have that tag for the next few months)