* Previously, with a .box inside a .box, any clicking on a collapse/expand button in either .box would cause both of them to collapse/expand. This commit makes sure parent and child boxes do not interfere with each other.
* Previously, with a .box inside a .box, any clicking on a collapse/expand button in either .box would cause both of them to collapse/expand. This commit makes sure parent and child boxes do not interfere with each other.