GtkComboBox cell renderers editor is too hard to discover
glade 3.37.0 (Nightly flatpak)
For a combobox to work, we need to (1) set a model, (2) add cell renderer(s), and (3) bind the cell renderer(s) to the model columns.
While (1) is easy to find, (2) and (3) are too hidden.
When we add a GtkComboBox, if we look at the right pane, in the General tab, it's very easy to find how to set the tree model. It's right there and discoverable.
From there its very easy to create a new list store tree model. After we select the list store from the left sidebar, if we look again at the General tab, it's again very easy to find how to define columns and add rows.
The problem is that now we hit a dead end. If it's the first time creating a combobox, it's not obvious that we must define cell renderers. And even if we know that we must define cell renderers, it's apparently impossible. There is no access to the editor from the General tab.
While helping my GSOC student, I had to search the web for an answer, and learn that there is an "Edit..." option in the right click menu.
But even if it's not hidden by overflow, this is not the place where people will look for it.
It would be easier to find the editor in the General tab, closer to the model chooser.