Add known networks when building the Linux ISO

* Instead of at login

.linux_items/include/airootfs/etc/skel/.update_network

@@ -2,9 +2,8 @@
 #
 ## Setup network and update hostname
 
-# Add saved networks to NetworkManager
-sudo setup-wifi
-sudo systemctl restart NetworkManager
+# Wait for WiFi
+sleep 1s
 
 # Set hostname
 IP="$(ip a show scope global \

Build Linux

@@ -284,6 +284,7 @@ function update_live_env() {
 
     # WiFi
     cp "$ROOT_DIR/.linux_items/known_networks" "/root/known_networks"
+    echo "add-known-networks" >> "$LIVE_DIR/airootfs/root/customize_airootfs.sh"
 }
 
 function update_repo() {