Added model class to app_list context

[Raffaele Salmaso]

I need to manipulate the app_list in my custom admin view, and the easiest way to get the result is to have access to the model class (currently the dictionary is a serialized model).

In addition I would make the _build_app_dict method public, as it is used by the two views index and app_index.

[Raffaele Salmaso]

PR -> ​https://github.com/django/django/pull/13447

[Carlton Gibson]

Seems reasonable. I guess we need at least a release note, and tests, but do you think we need additional docs here? (The related methods aren't themselves documented so not sure what we should say.) Thanks.

[Raffaele Salmaso]

Release note, docs, and tests added.

For additional docs: I don't know either. I just looked at the code and I didn't check for docs.

[Jacob Walls]

each_context() is the currently documented way to access this functionality, so it strikes me that making updates there should suffice, and further documentation improvements could be evaluated separately.