Cannot create extra tabs/pages on Notebook
Glade 3.22.1 allows you to create GtkNotebook widgets, but no apparent way to expand the number of tabs beyond the three initially created tabs/pages. You can choose to edit page > 2 but it doesn't create more pages.
Expected behaviour: add an attribute "number of tabs", similar to those in GtkBoxes. (I'm using Gtk3+, set to 3.18 but the behaviour is the same if I choose 3.0)
Great tool by the way :-)