Bring back  "Add an option to enable/disable the Navigation Bar (1/2)"

This reverts commit 550f393497242c96fc0ebfb8018bcde1604724a1.
"Disable navigation bar "on the fly", without reboot"

This reverts commit 3ab0c46438bb856776ef04e5068f9c0b103a5c9b.
swipe anywhere on notif panel to switch between views not only on the bottom handle