Using Plone 5.2(.5), when I turn off Automatically generated tabs in the navigation settings and create Portal tabs in the Actions control panel, I lose the lovely dropdown menus.
Looking through the source, I'm guessing the navigation code can't create a suitable tree from the portal action (which is just a url string like string:${globals_view/navigationRootUrl}/corporate-services).
Is there any way to enable a dropdown menu for a manually created portal tabs?