Snap to grid

[davidtang123]

Maybe snap nodes to nearest 4 pixels (ex floor to nearest multiple of 4

[davidtang123]

Could be difficult, trying to figure out where to add modulo to:

nodeDragContext.translateAnchorX = (adminMapController.getOverlay().getBoundsInParent().getWidth() / 2) +
(node.getPreviewX() - adminMapController.getOverlay().getBoundsInParent().getWidth() / 2) * scale
+ adminMapController.getOverlay().getTranslateX()
+ (scale - 1) * (scale - 1) / (scale) * adminMapController.getMapController().getOverlay().getBoundsInParent().getWidth() * 0.5;