Navigation Map position and zoom should be persistant

[knowknowledge]

The current Map widget is created from scratch each time it is opened. This means that the state of the map (Pan/Zoom?) is lost each time it is closed.

I would prefer not to implement this as static variables.

Perhaps the Map Widget doesn't get destroyed somehow?

[knowknowledge]

Persist the map scale by using a state variable in the Simulation.

Do not zoom the map's pan because then it will not follow the player's movements.