I tried this and the icons next to each password are completely different than in the screencap above. All I have is a button that shows or hides private keys for posting, active and memo. No editing is allowed.

I can't do anything with the owner key; there is no button, no icon. I logged out and tried logging in again with the owner key and got a warning message that that was not allowed. It said I must use a private key, not a public key. What's that all about? Is this tutorial out-of-date?