Migrate to three.js 0.120 and convert mouse events to pointer events

[robertgz]

Update three.js from 0.119 to 0.120 or a higher version.

This application uses mouse events in MouseClickComponent and MouseDragComponent.

When three.js is updated to 0.120 there are some small changes in the interaction with the mouse. This should be resolved by converting the mouse events to pointer events. The need to switch to Pointer Events is noted in the three.js migration guide.
https://github.com/mrdoob/three.js/wiki/Migration-Guide#r119--r120