LP#1680566 - WIP follow-up - pcrud CUD != permacrud

LP#1680566 - WIP follow-up - pcrud CUD != permacrud

This patch partially accounts for the fact that open-ils.pcrud.{create|delete|update}.foo
is /not/ a drop-in replacement for the open-ils.permacrud equivalents, as open-ils.pcrud
requires that the client establish a session and begin a transaction first.

This patch addresses the following:

- creating, updating, and deleting bib and authority record display
  attributes in Vandelay
- saving records when the XUL MARC editor is invoked from Vandelay
- the translator popup-dialog (e.g., as used by the copy status admin page)

Left TODO:

- deleting MFHDs and invoking the MARC editor on them

Signed-off-by: Galen Charlton <gmc@equinoxinitiative.org>