Per Console IP/Port Config

[buckbanzai]

For freelancers or others who are working on different types of consoles repeatedly, it'd be nice if we saved the last IP/port config they used for that type of console.

We should avoid using ConfigParser's default section functionality while implementing this, since ConfigUpdater explicitly doesn't support that.

If nothing's saved for a specific console, we can then load/display the defaults for that console type

[buckbanzai]

As we add more console-specific features (like the Repeater on DiGiCo or the Cue List Player (a24fc01) for NADIA/D-Mitri, this would be helpful so config entries were logicially split out per console integration