In Edit mode, don't bother wrapping domain objects which should
not be edited even in principle. Avoids insulating these objects
from updates which occur asynchronously, which in turn avoids
WTD-1291.
Invoke persist calls when leaving Edit mode in a group, instead of
in-order, to allow these revision-checking to be handling for the
group as a whole. WTD-1033.
Act as if the object being edited is the root object when
in Edit mode, except in the Library pane (which has its own
means of getting the real root object.) WTD-922.
Add directive for exposing expressions which should be
evaluated for the browser's onbeforeunload event, to
prevent user-initiated navigation from causing a loss
of unsaved changes. WTD-1035.
Add tests for capabilities which have been updated to work
when only a model (and not whole objects) are cached; that
change was introduced to prevent misbehavior of the Remove
action in Edit mode, WTD-473.
Utilize model cache, permitting object models in edit mode to
be reused across multiple distinct instances with unique
contexts (unique contexts are necessary to avoid ambiguity in
the Remove action, WTD-473).
To avoid infinite digest cycles as a consequence of this,
refactor context/composition capability wrappers such that the
former is idempotent (since idempotence is no longer ensured
by the EditableDomainObjectCache) to avoid infinite digest
errors in Edit mode.
Implement a cache to store domain object models,
to allow the cache for individual objects to distinguish
objects based on their parentage and avoid ambiguous
Remove actions (WTD-473.)
