Get default dimensions from somewhere

[todo]

renew-lib/src/features/external-simulation/providers/ExternalSimulation.js

Lines 151 to 156 in e08ae75

	label.width = 150; // TODO get default dimensions from somewhere
	label.height = 50;
	label.x = parent.x || 0;
	label.x -= (label.width - (parent.width || 0)) / 2;
	label.y = parent.y || 0;

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This issue was generated by todo based on a TODO comment in e08ae75 when #124 was merged. cc @renew-js.

[0x4d]

See #123