application.Window carries unexported methods, so the hide/restore paths could
not be faked and the earlier tests could only assert which entries survived a
restore, never which windows were actually shown.
The bookkeeping now goes through hideableWindow, the four methods it needs,
with the window enumeration and the main-window raise behind seams that are nil
in production. That makes the case the owner tag exists for testable end to
end: an install started during SSO login restores only the login popup it hid,
and leaves the main window hidden until the login popup itself closes.
Zoltán Papp
b1c154dc3d