Ticket #1446:

Without the crypto object, the user is now presented with a very bared bones
keygen tag powered UI. One can only select a key strength and only use RSA.

This fix adds simple UI to make better use of the keygen tag:

1. Allows the use of ECC.
2. Gives simple info on how the key strengths map to RSA key size and
ECC curves.

When the user selects High, they get RSA 2043, and ECC nistp384.
When the user selects Medium, they get RSA 1024, and ECC nistp256.

Tested work with the server to issue both RSA and ECC certs of the 4 strengths mentioned above.