Fixed #28550 -- Restored contrib.auth's login() and logout() views' respect of positional arguments.

Regression in 78963495.

Forwardport of f8e0557b from stable/1.11.x

Unused since 197b1878.

Thanks Idan Melamed for the original patch.

"Importing the view" is no longer applicable after
a9fd740d.

Previously, deferring fields in different classes didn't omit the
superclass' deferred field.

Thanks Simon Charette for the suggested fix.

Previously, it was a QuerySet which could reevaluate to a new value if the
model's data changes. This is inconsistent with other Field.value_from_object()
methods.

This allows reverting the fix in the admin for refs #27998.

It makes it easier to debug MediaOrderConflictWarnings
(refs #28377).

This includes test coverage for the calendarMonth JS function in calendar.js

Thanks Andreas Poisel for the report.