ability-to-create-object-graphs

Both the Openobject server and GTK client are able to create full object graphs using nested hashs. However, the web-client doesn't support and requires you to save every object before adding new linked objects.
For example, in the GTK client, you fill a sale order and that's only once you validate the order that all the graph (order + order lines) are persisted, while with the GTK client you should first save the order before adding lines.

Aside from the extra number of clicks, the issue is that sometimes you just want to offer a temporary interface to the user rather than really persisting objects, such as when manipulating wizards.

For instance, in the product_variant_configurator module, you want to parameter the variant lines of the template to get a variant selected automatically. This is currently not really possible in the web-client.