message: fixed form name in iso creation form
diff: "VM_NAVBAR": "Virtual machines",
  "SG_TEMPLATES_NAVBAR": "Security group<br>templates",
  - "NEW_TEMPLATE": "New template",
  + "NEW_TEMPLATE": "Register a new template",
  "TEMPLATES_ISO": "Templates and ISOs",
  "URL": "URL",
  "ISO_REGISTER_IN_PROGRESS": "Registering an ISO",
  