When a parent item was renamed, the `TreeView` was doing everything as
expected, however `AssetCatalogService::update_catalog_path` is supposed
to also update the catalog paths of all sub-catalogs [which it does --
but it does not tag sub-catalogs as having unsaved changes, resulting in
wrong saving of catalogs afterwards, meaning the parent item was saved
with the old name and a new item with the new name was created].
Now also tag sub-catalogs for having unsaved changes.
This should also go into 3.3 LTS
Pull Request: https://projects.blender.org/blender/blender/pulls/107121
100f37af49