netdata: survive a failed apt update, leave quietly on Cancel

The add-on runs on the Proxmox host, where the enterprise repository without a
subscription answers 401 and apt update exits 100 (2 of 3 failures in three
days). apt_update_safe retries, points at the enterprise repository and
carries on; the netdata repository was fetched fine.

Cancel in the first menu was reported as a failed run.

tools/addon/netdata.sh

@@ -80,7 +80,7 @@ install() {
   msg_ok "Set up repository"
 
   msg_info "Installing ${APP}"
-  $STD apt update
+  apt_update_safe
   $STD apt install -y netdata
   msg_ok "Installed ${APP}"
   msg_ok "Completed successfully!\n"
@@ -108,7 +108,7 @@ OPTIONS=(Install "Install ${APP} on Proxmox VE"
   Uninstall "Uninstall ${APP} from Proxmox VE")
 
 CHOICE=$(whiptail --backtitle "Proxmox VE Helper Scripts" --title "${APP}" \
-  --menu "Select an option:" 10 58 2 "${OPTIONS[@]}" 3>&1 1>&2 2>&3)
+  --menu "Select an option:" 10 58 2 "${OPTIONS[@]}" 3>&1 1>&2 2>&3) || exit 0
 
 case $CHOICE in
 "Install") install ;;

tools/pve/pve-privilege-converter.sh

@@ -31,7 +31,7 @@ check_root() {
 
 select_target_storage_and_container_id() {
   echo -e "\nSelect target storage for restored container:\n"
-  mapfile -t target_storages < <(pvesm status --content rootdir | awk 'NR > 1 {print $1}')
+  mapfile -t target_storages < <(pvesm status --content images | awk 'NR > 1 {print $1}')
   for i in "${!target_storages[@]}"; do
     printf "%s) %s\n" "$((i + 1))" "${target_storages[$i]}"
   done