Make addresses configurable

I.e. make the address change mode of the configuration item work.

[x] Open GUI client side which can be used to select a different address.
[x] Send address back to server.
[x] Apply address to device, check for collisions, handle accordingly.
- Change and scheduleScan()?
- Handle directly in setter without scan?
- Scan resets all addresses on conflicts ATM to try resolving conflicts. Maybe require addressables to persist a "preferred" address?

fnuecke / Circuity