prefs: Change default of show-fallback-app-menu
The app menu always was a GNOME-only thing, so after it was removed this cycle, assuming that it is not displayed by the environment is a better default.
Fixes #493 (closed)
The app menu always was a GNOME-only thing, so after it was removed this cycle, assuming that it is not displayed by the environment is a better default.
Fixes #493 (closed)