ComboBox: selecting items with children, Gtk2 vs Gtk3
Steps to reproduce
Compile the sample code combo.c, it builds a tree model with an item that has child items, and uses that model in a ComboBox.
Expected outcome (Gtk2)
When compiled with Gtk2, when the item with children is selected and its children displayed, and extra item representing the parent is added to the top, allowing the parent to be selected:
Current behavior (Gtk3)
However, compiled with Gtk3, that item that allows selection of the parent is missing:
So how does one select "Item with children", using the mouse, under Gtk3? The item can be selected using the keyboard, but apparently not with the mouse. Is there a way to get the Gtk2 behaviour back with Gtk3?
Version information
I tested this with Gtk2 2.24.31 and Gtk3 3.22.26.