Update oem-factory-reset - wider window to show secrets

This partially fixes #1537, but while the increased width wouldn't be a problem on the NV41 AFAICT, I don't know about other machines.

I don't know what @tlaurion means with "busybox's folding", which may be a better solution.

Signed-off-by: Christian Foerster <christian.foerster@mailfence.com>

Author: UndeadDevel

initrd/bin/oem-factory-reset

@@ -1327,7 +1327,7 @@ fi
 ## Show to user current configured secrets prior of rebooting
 whiptail --msgbox "
     $passphrases" \
-    $HEIGHT $WIDTH --title "Configured secrets"
+    $HEIGHT $(($WIDTH*2)) --title "Configured secrets"
 
 ## all done -- reboot
 whiptail --msgbox "