FR - Add MDM name to About this screen

[master-vodawagner]

This would just help it situations where organisations have multiple Jamf MDMs for different user bases, can be useful for uses to know if/when they need to seek assistance with organisation helpdesks.

[scriptingosx]

implemented in 1.3, you will have to hold the option key when clicking "About this Mac" to see the MDM server. You should also see it in the Network info panel (might have to hit command-N to show the network status icon)