Describe the bug
The ipv6 address formatting of the displayed ipv6 addresses on the status page is incorrect.
For example, the IP of my unit is formatted as "2a0d:9c42::9:0000:5acf:79ff:fe9c:8c5a". The DNS address is formatted as "2a0d:9c42::9:0000:0000:0000:0053:0001"

There are multiple issues here, but the one that creates an incorrect string is putting a double colon (::) when all eight hextets are displayed.

The other issues, which don't create a technically incorrect string, but doesn't follow the guidelines for formatting human-readable addresses, are:

1. Not stripping leading zeroes
2. Not (correctly) grouping consecutive zero-hextets into the double colon.

Speculating, I think the assigned IP address needs a hextet with leading zeroes to trigger the bug.

To Reproduce
Steps to reproduce the behavior:

1. Enable IPv6 in the settings
2. (Possibly assign an IP address with multiple leading zeroes in an otherwise non-zero hextet)
3. Look at the formatted IPv6 addresses on the status page

Expected behavior
IPv6 address strings are at minimum valid, but should preferably follow guidelines for human-readable address formatting.

Screenshots

Hardware information:

• AMS reader: Pow-U+

Relevant firmware information:

• Version: 2.5.3

Additional context
Add any other context about the problem here.