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.
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.