Drag and drop for meta-contacts does not work
Bug description
Using drag and drop to create meta-contacts does not work. This completely breaks the meta-contact feature as there seems to be no other way to merge contacts.
Steps to reproduce
Drag a contact into another. Nothing happens.
Software versions
OS version: Debian testing amd64
GTK version: 2.24.25
PyGTK version: 2.24.0
Further information
I found #6783 (closed), but it's three years old and claims to be fixed, while my GTK version is way newer than what was reported there.