I've created a new email alias in my iCloud email account (needless to say, they don't let the me.com domain to be added anymore, which is a shame; icloud.com sounds so... plain? :) ). The ability to change the label name and label color of the new alias in its settings is grayed out (or unclickable). I can still do this for the old alias, though. Is this a bug or some sort of a new feature?