Horizontal scrolling using the mouse whell is possible with Gtk 3. I don't know about Gtk 2, but given that it is superseeded it is very very unlikely that it will see new features. Therefore, I'm closing this bug.
Horizontal scrolling using the mouse whell is possible with Gtk 3. I don't know about Gtk 2, but given that it is superseeded it is very very unlikely that it will see new features. Therefore, I'm closing this bug.