Remove unlock option for key encrypted geli pools

If a pool is locked with a geli key ( it can be verified by seeing the value of encrypt option in pool.query output where it should be 1, for passphrse it's 2 ), we should not show unlock option for the pool if it is not decrypted.

Right now if a key encrypted pool fails to decrypt for any reason, UI shows unlock button which opens up a passphrase/recovery key dialog, we should remove that dialog and maybe have some text saying key encrypted geli pool failed to decrypt.