It does not make sense to render every cell in a treeview as
drop target, even when the treeview itself is set as a drop destination.
https://bugzilla.gnome.org/show_bug.cgi?id=761686
if (widget)
state |= gtk_widget_get_state_flags (widget);
- state &= ~(GTK_STATE_FLAG_FOCUSED | GTK_STATE_FLAG_PRELIGHT | GTK_STATE_FLAG_SELECTED);
+ state &= ~(GTK_STATE_FLAG_FOCUSED | GTK_STATE_FLAG_PRELIGHT | GTK_STATE_FLAG_SELECTED | GTK_STATE_FLAG_DROP_ACTIVE);
if ((state & GTK_STATE_FLAG_INSENSITIVE) != 0 ||
(cell && !gtk_cell_renderer_get_sensitive (cell)) ||