Allow multiple servers in the same network

[ImUrX]

Depends on SlimeVR/SolarXR-Protocol#127

This adds the following features:

• A list of known devices that only works with mac addresses
• A new model version for config and migrate by adding all known trackers that are mac addresses to a set called knownDevices
• A way to forget connected devices (FIXME: for some reason it ends up disconnecting after 30 seconds have passed instead of immediately)
• A prompt whenever a new unknown device is found, where you are asked if you want to connect to it or ignore it for the rest of this session.
• Make trackers auto-connect without a prompt when on the connect trackers page

Fixes #74

[salmoooon]

Didn't know this wasn't supported and ended up spending too much time retrying, setting up a VLAN, and then buying a router as a last-ditch effort.

Bump on this and hope this could be merged soon!

[Erimelowo]

Slime -> tracker