cubicweb #472804 prefix all internal entity names with "CW" [open]

CW is a de facto prefix for internal cubicweb entities. Since we do not have namespaces it can be used to avoid collisions with user defined cubes.

Currently some entities which are always included when creating a new instance do not have that prefix.

This includes:

  • Bookmark
  • Workflow related stuff (State is a good candidate for collision)
  • EmailAddress
  • ExternalUri
  • Bookmark
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