Consumer sprint34 bugid 99775

Case: https://wikia.fogbugz.com/default.asp?99775

Problem: Category select is not saving sortkey for categories.

In javascript we are using lowercase for category attributes. In PHP we are using lowerCamelCase for categories attributes. Now all attributes are using lowercase as in js.

@kflorence : Can you look at those changes if this is correct way to fix it and all edge cases are fixed there.