[NEW]Allow to define a different set of fields to be asked in the 'User Details' section of the User Wizard than the set of fields shown at Registration time for the Registered users. It will be backported to 12.x after 12.1 is released.

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@50139 b456876b-0849-0410-b77d-98878d47e9d5