Ability to edit MX records through Login-As even if User doesn't have access

Related to feature http://ift.tt/1DYcNX6 , it would be nice to be able to edit the DNS MX records through Login-As.



Now, the DNS page is editable, but the MX records page returns "Cannot modify MX records"

Ability to edit MX records through Login-As even if User doesn't have access