View > Outline was one app-wide flag saved in the interface preferences,
so after Cmd+Y every later launch drew every opened or new document as
outlines, with no fills. The flag is now part of each document's view:
a document opens in Preview, each tab shows its own Outline or Preview,
and the setting is not saved at launch. An older preferences file that
holds the flag still loads, and its value is ignored.
The Outline command and ui.set's outline act on the active document and
are an error without one.