UnstableChanges

Summary

  1. Backport #5482 to Pharo8, (details)
Commit 0acb28259ab34bc99216a72972f21ca66288b4f8 by marcus.denker
Backport #5482 to Pharo8,
The #openMenu change was already in. this just adds true false nil var
completion
Fixes #6420
The file was modifiedsrc/NECompletion/NECSpecialVariableEntry.class.st (diff)
The file was modifiedsrc/NECompletion/RBVariableNode.extension.st (diff)