After I got now through the creation of combo-boxes, I just want today explain the creation-process.

Update warning:
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|Currently, I use 2 extensions to the GTK.GtkComboBox instance in this example. But I currently don't know, if there should be another way or if these changes will go into the original distribution. If that will be clear one day, i might update this thread accordingly.

Might be updated in the future...