Method disconnect

src/main/java/fieldbox/boxes/Box.java:142–150

Disconnect box 'b' to this box. b is now no longer child of this box, this box is now no longer parent of 'b'

(Box b)

	/**
	 * Disconnect box 'b' to this box. b is now no longer child of this box, this box is now no longer parent of 'b'
	 */
	public Box disconnect(Box b) {
		children.remove(b);
		b.parents.remove(this);

		all.remove(b);
		b.all.remove(this);

		return this;
	}