Description of problem:

In version 1.0.0 of Dogtag, the CA installation wizard asks what key size to use
for the CA.  This page of the wizard is confusing and could be simplified.

Today the page reads:
==
  Common Key Settings
  Key Type: 	
  Use the default key size (2048 bits for RSA, 256 bits for ECC).
  Use the following custom key size
  Key Size: [2048]
==

Instead it should offer the administrator a single drop-down menu with these
possible values:

2048-bit RSA
4098-bit RSA
256-bit ECC
384-bit ECC

Version-Release number of selected component (if applicable):
1.0.0

How reproducible:


Steps to Reproduce:
1.
2.
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Actual results:


Expected results:


Additional info:
I'd very much like to remove the option to allow people to type in a different
key-size. If there are standard key-sizes that I have not listed above, let's
consider adding them to the list rather than allowing people to type in any value.