shell: Remove App menu
Move the items in the App Menu at the bottom of the primary menu.
A side effect of removing app-menu fully in Evince is that
gnome-shell will show a fallback menu with a Quit
action,
which Evince has always avoided to have. The fallback menu
will be removed from gnome-shell (gnome-shell#624 (closed)).
See also Initiatives#4 (closed)
Fixes #994 (closed)
Edited by Germán Poo-Caamaño