The loading of the action model extensions have been split in this
commit:
- when calling load, a first promise is returned. It is meant to be
resolved as soon as all the query informations are available.
- a second promise returned by a new method "isReady" is resolved when
all of the extension data have been fetched.
This difference allow to not wait for server calls irrelevant for the
query. By default "isReady" will always wait for a full load call, but
this is meant to be overridden in case optimisations can be made.
Julien Mougenot
cc6a60bec9