function groupMoveToCenter(canvas, data) {
	const screenCenter = pointInCanvas(canvas[CanvasSmbl].data, window.innerWidth / 2, window.innerHeight / 2);
	placeToCell(screenCenter, canvas[CanvasSmbl].data.cell);

	const shift = pointShift(screenCenter, centerCalc(data), -1);
	iteratePoints(data, point => { if (point) { pointShift(point, shift); } });
}
@param {CanvasElement} canvas, @param {DiagramSerialized} data