The legacy actions were no longer working with the new changes, due to

the order in which some state was being initialized. They're now

initialized with attachment and placement information set correctly, and

with parent IDs mapped to the right placements during registration.
A hidden attribute is now provided to enable these to turn off

deprecation warnings for the actions, since legacy actions already have

their own, more specific ones.
DOM attributes are also overridden to not contain attachment points.

Unit tests pass.