Display WiFi information in About screen

[sc68cal]

This was partially done to get my feet wet with making changes to the Watchy library and getting my dev toolchain set up, but also would be useful information to display

[jakofranko]

I love this addition, it's so helpful especially if you change between wifi networks semi-regularly. No way to see wifi info except for that one moment right after you've successfully connected to a network.

[sqfmi]

Awesome, thank you so much for the PR! Very useful feature.