Add Asset Tag field on SX/DX/MX units

Add an ASSET TAG field in the code somewhere.
Ideally, perhaps under SETUP > CONFIGURATION > SystemUnit heading.
Add it to API as well.
Currently, I still have to have a spreadsheet to know where each asset tag is located... this can be eliminated with corporate tracking, by pulling serial numbers and asset tags directly from the SX/MX/DX units.
Ideally, if an asset tag can be added to the TelePresence Touch and Cameras as well, this would be fantastic!