Remove deprecated gtk_tree_view_set_rules_hint
This call has been deprecated since version 3.14 and removal doesn't
change current visual appearance. CSS support for this was removed 8
years ago, and it also seems strips in TreeViews are never going to
come back¹. The only option for now seems to use ListBox² after having
migrated to GTK 4…
¹ https://gitlab.gnome.org/GNOME/gtk/-/issues/581
² https://docs.gtk.org/gtk4/class.ListBox.html
Removes thirty “warning: ‘gtk_tree_view_set_rules_hint’ is deprecated”
29 files changed: