Asset Tracker's IP address fields truncate

[emory]

I appear to be unable to use an ipv6 address in the IP address fields for an asset. RT's built-in IP address fields (single/multiple/range) support values of ipv4 and ipv6 addresses, so I think Asset Tracker fields should too.

[btb]

Perhaps AT's built-in IP address field should be deprecated in favor of custom fields.