Bug: View radius and view center in resulting map json switched

When setting the initial view radius and initial view center in the map-maker, makeing your map and then generating and downloading the map, the resulting JSON has its radius and center values switched.

Example:

Result:

  "initialViewRadiusX": -10,
  "initialViewRadiusY": -10,
  "initialVieCenterX": 10,
  "initialViewCenterY": 10,

Also, there's a typo in "initialVieCenterX": 10,. It is missing a w