Make World default scale bigger

[evgeniysergeev]

Increase default zoom to at least 200%

[penev92]

OpenRA/OpenRA#20573 makes that possible and was just merged, so this will be doable after the next engine update.
I think also increasing the max zoom-in level would be nice, so something like

WorldViewportSizes:
	DefaultScale: 2
	MaxZoomScale: 4